diff --git a/content/zettels/positioning_stations.md b/content/zettels/positioning_stations.md
index f283e92..ca37318 100644
--- a/content/zettels/positioning_stations.md
+++ b/content/zettels/positioning_stations.md
@@ -9,17 +9,121 @@ Tags
 :
 
 
-## Linear Stage {#linear-stage}
+## Review {#review}
 
 
-## Spindle {#spindle}
+### Sensors {#sensors}
 
-<https://www.labmotionsystems.com/>
+-   Capacitive: <&schroer17_ptynam;&villar18_nanop_esrf_id16a_nano_imagin_beaml;&schropp20_ptynam>
+-   Fiber Interferometers Interferometers:
+    -   Attocube FPS3010 Fabry-Pérot interferometers: <&nazaretski15_pushin_limit;&stankevic17_inter_charac_rotat_stages_x_ray_nanot;&engblom18_nanop_resul;&nazaretski22_new_kirkp_baez_based_scann>
+    -   Attocube IDS3010 Fabry-Pérot interferometers: <&holler17_omny_pin_versat_sampl_holder;&holler18_omny_tomog_nano_cryo_stage;&kelly22_delta_robot_long_travel_nano>
+    -   PicoScale SmarAct Michelson interferometers: <&schroer17_ptynam;&schropp20_ptynam;&xu23_high_nsls_ii;&geraldes23_sapot_carnaub_sirius_lnls>
 
 
-## Stewart Platforms {#stewart-platforms}
+### Actuators {#actuators}
 
-See [Stewart Platforms]({{< relref "stewart_platforms.md" >}}).
+-   Piezoelectric: <&nazaretski15_pushin_limit;&holler17_omny_pin_versat_sampl_holder;&holler18_omny_tomog_nano_cryo_stage;&villar18_nanop_esrf_id16a_nano_imagin_beaml;&nazaretski22_new_kirkp_baez_based_scann>
+-   3-phase linear motor: <&stankevic17_inter_charac_rotat_stages_x_ray_nanot;&engblom18_nanop_resul>
+-   Voice Coil: <&kelly22_delta_robot_long_travel_nano;&geraldes23_sapot_carnaub_sirius_lnls>
+
+
+### Bandwidth {#bandwidth}
+
+Rarely specificity.
+Usually slow, so that only drifts are compensated.
+Only recently, high bandwidth (100Hz) have been reported with the use of voice coil actuators <&kelly22_delta_robot_long_travel_nano;&geraldes23_sapot_carnaub_sirius_lnls>.
+
+
+### Degrees of Freedom {#degrees-of-freedom}
+
+-   Full rotation for tomography:
+    -   Spindle bellow YZ stage: <&wang12_autom_marker_full_field_hard;&schroer17_ptynam;&schropp20_ptynam;&geraldes23_sapot_carnaub_sirius_lnls>
+    -   Spindle above YZ stage: <&stankevic17_inter_charac_rotat_stages_x_ray_nanot;&holler17_omny_pin_versat_sampl_holder;&holler18_omny_tomog_nano_cryo_stage;&villar18_nanop_esrf_id16a_nano_imagin_beaml;&engblom18_nanop_resul;&nazaretski22_new_kirkp_baez_based_scann;&xu23_high_nsls_ii>
+-   Only for mapping: <&nazaretski15_pushin_limit;&kelly22_delta_robot_long_travel_nano>
+
+**Stroke**:
+
+-   &gt; 1mm: <&nazaretski15_pushin_limit;&kelly22_delta_robot_long_travel_nano;&geraldes23_sapot_carnaub_sirius_lnls>
+
+
+### Payload capabilities {#payload-capabilities}
+
+-   Micron scale samples
+-   Samples up to 500g <&nazaretski22_new_kirkp_baez_based_scann;&kelly22_delta_robot_long_travel_nano>
+
+
+### Nano Positioning End-Station without online metrology {#nano-positioning-end-station-without-online-metrology}
+
+{{< figure src="/ox-hugo/endstation_id11.png" >}}
+
+
+### End-Station with integrated online metrology {#end-station-with-integrated-online-metrology}
+
+<div class="table-caption">
+  <span class="table-number">Table 1:</span>
+  End-Station with integrated online metrology
+</div>
+
+| Architecture                                                      | Sensors and measured DoFs    | Metrology Use       | Stroke, DoF             | Samples      | Institute, BL  | Ref                                    |
+|-------------------------------------------------------------------|------------------------------|---------------------|-------------------------|--------------|----------------|----------------------------------------|
+| Spindle / **XYZ piezo stage** / Spherical retroreflector / Sample | 3 interferometers: \\(YZ\\)  | Characterization    | XYZ: 100um, Rz: 180 deg | micron scale | PETRA III, P06 | <&schroer17_ptynam;&schropp20_ptynam>  |
+| Spindle / Metrology Ring / **XYZ** Stage / Sample                 | 3 Capacitive: \\(YZR\_x\\)   | Post processing     |                         | micron scale | NSLS, X8C      | <&wang12_autom_marker_full_field_hard> |
+| **XYZ piezo stage** / Spindle / Metrology Ring / Sample           | 2 interferometers : \\(YZ\\) | Detector triggering |                         | micron scale | NSLS, HRX      | <&xu23_high_nsls_ii>                   |
+
+<a id="figure--fig:endstation-schroer"></a>
+
+{{< figure src="/ox-hugo/endstation_schroer.png" caption="<span class=\"figure-number\">Figure 1: </span>Figure caption" >}}
+
+<a id="figure--fig:endstation-wang"></a>
+
+{{< figure src="/ox-hugo/endstation_wang.png" caption="<span class=\"figure-number\">Figure 2: </span>Figure caption" >}}
+
+<a id="figure--fig:endstation-xu24"></a>
+
+{{< figure src="/ox-hugo/endstation_xu24.png" caption="<span class=\"figure-number\">Figure 3: </span>Figure caption" >}}
+
+
+### End-Station with integrated feedback loops based on online metrology {#end-station-with-integrated-feedback-loops-based-on-online-metrology}
+
+<div class="table-caption">
+  <span class="table-number">Table 2:</span>
+  End-Station with integrated feedback loops based on online metrology. Stages used for feedback are indicated in bold font.
+</div>
+
+| Architecture                                                         | Sensors and measured DoFs              | Bandwidth | Stroke, DoF                          | Samples    | Institute, BL     | Ref                                                                           |
+|----------------------------------------------------------------------|----------------------------------------|-----------|--------------------------------------|------------|-------------------|-------------------------------------------------------------------------------|
+| **XYZ piezo motors** / Mirrors / Sample                              | 3 interferometers: \\(XYZ\\)           | 3 PID     | XYZ: 3mm                             | light      | APS               | <&nazaretski15_pushin_limit>                                                  |
+| **Piezo Hexapod** / Spindle / Metrology Ring / Sample                | 12 Capacitive: \\(XYZR\_xR\_y\\)       | 10Hz      | XYZ: 50um, Rx/Ry:500urad, Rz: 180deg | light      | ESRF, ID16a       | <&villar18_nanop_esrf_id16a_nano_imagin_beaml>                                |
+| **Piezo Tripod** / Spindle / Spherical Reference / Sample            | 5 Custom interferometers: \\(YZR\_x\\) | PID       | XYZ: 400um, Rz: 365 deg              | light      | PSI, OMNY         | <&holler17_omny_pin_versat_sampl_holder;&holler18_omny_tomog_nano_cryo_stage> |
+| **Stacked XYZ linear motors** / Spindle / XY / Cylindrical Reference | 5 interferometers: \\(XYZR\_xR\_y\\)   |           | XYZ: 400um, Rz: 360 deg              | light      | Soleil, Nanoprobe | <&stankevic17_inter_charac_rotat_stages_x_ray_nanot;&engblom18_nanop_resul>   |
+| **XYZ piezo** / Spindle / Metrology Ring / Sample                    | 3 interferometers : \\(XYZ\\)          |           | XYZ: 100um, Rz: 360 deg              | up to 500g | NSLS, SRX         | <&nazaretski22_new_kirkp_baez_based_scann>                                    |
+| **Parallel XYZ voice coil stage** / Sample                           | 3 interferometers: \\(XYZ\\)           | 100Hz     | XYZ: 3mm                             | up to 350g | Diamond, I14      | <&kelly22_delta_robot_long_travel_nano>                                       |
+| Rz / **Parallel XYZ voice coil stage** / Sample                      | 3 interferometers: \\(XYZ\\)           | 100Hz     | YZ: 3mm, Rz: +-110deg                | light      | LNLS, CARNAUBA    | <&geraldes23_sapot_carnaub_sirius_lnls>                                       |
+
+<a id="figure--fig:endstation-nazaretski"></a>
+
+{{< figure src="/ox-hugo/endstation_nazaretski.png" caption="<span class=\"figure-number\">Figure 4: </span>Figure caption" >}}
+
+<a id="figure--fig:endstation-villar"></a>
+
+{{< figure src="/ox-hugo/endstation_villar.png" caption="<span class=\"figure-number\">Figure 5: </span>Figure caption" >}}
+
+<a id="figure--fig:endstation-holler"></a>
+
+{{< figure src="/ox-hugo/endstation_holler.png" caption="<span class=\"figure-number\">Figure 6: </span>Figure caption" >}}
+
+<a id="figure--fig:endstation-engblom"></a>
+
+{{< figure src="/ox-hugo/endstation_engblom.png" caption="<span class=\"figure-number\">Figure 7: </span>Figure caption" >}}
+
+<a id="figure--fig:endstation-kelly"></a>
+
+{{< figure src="/ox-hugo/endstation_kelly.png" caption="<span class=\"figure-number\">Figure 8: </span>Figure caption" >}}
+
+<a id="figure--fig:endstation-geraldes"></a>
+
+{{< figure src="/ox-hugo/endstation_geraldes.png" caption="<span class=\"figure-number\">Figure 9: </span>Figure caption" >}}
 
 
 ## Manufacturers {#manufacturers}
@@ -35,5 +139,4 @@ See [Stewart Platforms]({{< relref "stewart_platforms.md" >}}).
 
 ## Bibliography {#bibliography}
 
-<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
-</div>
+<./biblio/references.bib>
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