Ok, I think I have all the issues resolved now. For the first one, the pictures earlier in the thread are using the old incorrect variant of the Openbuilds X carriage that has the shortened tabs. Thats causing the X motor side limit switch to miss. On the Y axis side the Limit switch trigger nub was not far enough out to make contact with the fan mounted limit switch. That picture also shows that the Taz 6 cutout toolhead mount notch is not installed, so that may also have contributed as well.
The issue of the toolhead overall travel is baffling, and i'm beginning to suspect the extrusions in the unit pictured were 500mm long in the X direction (stock Taz 4-5 lengths) and not 510mm long. Thats the only dimension that would account for the travel being narrower than the bed plate targets by 10mm. That being said, I've created two new mounts that allow a total of 20mm additional travel on x, 10mm per side. The endstop trigger for the X maximum on the idler side, though extended outward, is still in the correct position relative to the rods, so it should have the correct travel on that side, but the motor side may now have 10mm excess travel. If that ends up being the case I'll produce one with the X endstop prior location restored. Alternativly you should be able to use the 1st X end piece posted as is without modification.
The anti wobble is still in the works. I have a version that should work for the X antiwoble, the Y axis i'm having difficulty fitting it in the available space.
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