OneUp Carriage Holder
thingiverse
This is the first upgrade I installed on my OneUp. It connects the X-axis carriage to the belt very securely. To my knowledge, it should work for the TwoUp as well. It's modification of the simple_x_carriage_v003 by MarkQV. This won't stay on my printer long, but tape wasn't holding everything in place, and while black document clips were secure for the initial prints, I lost too much x-axis range with them. Instructions I printed this with .3mm layer height and 20% honeycomb infill (though I don't know if it needed it). After printing, slide between the extruder assembly and the belt, then secure. It is small enough to install without any disassembly.
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