This is a replacement X-carriage to replace the flimsy stock one on the A10M and A20M. It also allows to replace the wheels with dual bearing ones and will still hit the X endstop. I printed this in PETG, printed 4 shells and 100% infill to make it as strong as possible. I would recommend PETG or ABS, PLA might be fine. I didn't try the stock belt but the way it mounts you may need a longer one. I didnt try the stock belt I just cut a new one.
V2: Made and extra stong version and added in the spacers for the upper wheels. i found the aluminum spacers wanted to tilt to the sides a tiny bit although it didn't effect how smooth it rolled it bugged me.