apply docs proposal (PR) on top of xol-release-2023-12-21 (recent) to…

… update proposal

docs/carriage/assembly.md

@@ -21,5 +21,8 @@ description: Assembly instructions for the Xol Carriage
 | Attach the belts and take in the satisfying "snap" as they go in. <br/>`* If you can see the word "BACK" now you mucked it up` | <img src='assets/images/xol_carriage/xol_carriage_rear_attachbelts.png' width=300 /> |
 | Time to put on the carriage front with <br /> 4 M3x8 SHCS | <img src='assets/images/xol_carriage/xol_carriage_front_attachtorail.png' width=300 /> |
 | It's probing time, insert <br />2 M3x6 BHCS | <img src='assets/images/xol_carriage/xol_carriage_attach_probe.png' width=300 /> |
+| Don't forget to tuck in your belts <br/> `Tip: start with the belts too long. Make sure you have the same lenght on both belts and trim them flush to the front of the carriage with flush cutters after tucking them in.` | <img src='assets/images/xol_carriage/belt_tuck.png' width=300 /> |
 
+
+<br/><br/><br/><br/>
 ⬅  [Printed parts](printing.md) - [Toolhead assembly](toolhead_assembly.md) ➡

docs/carriage/bom.md

@@ -10,7 +10,7 @@ description: Bill Of Materials and required parts for the Xol Carriage
 | Qty | Item              | Notes                                                                                                    |
 | --- | ----------------- | -------------------------------------------------------------------------------------------------------- |
 | 5   | M3 Heatset Insert | Standard Voron spec: 5mm Outer Diameter x 4mm Length                                                     |
-| 6\* | M3 x 6 BHCS       | `Only 2 for MGN9H carriage` <br/>4x MGN12H carriage mounting<br/>2x probe module                         |
+| 6\* | M3 x 6 BHCS       | `Only 4 for MGN9H carriage` <br/>2x MGN12H carriage rear<br/>2x Carriage front<br/>2x probe module                         |
 | 8\* | M3 x 8 SHCS       | `only 4 for MGN12H carriage` <br/>4x Join carriage front to carriage rear<br/>4x MGN9H carriage mounting |
 | 4\* | M3 Hex Nut        | `Only 2 for MGN9H carriage` <br/>4x Carriage rear                                                        |
 | 2\* | M3 x 26 Pin       | Belt mounting system for 6mm belts. 24, 25 and 26mm pins have all been tested. 26mm is the strongest if pushing limits |