Micromake C1 upper idler (for Core XZ modification)

For Micromake C1 printer CoreXZ conversion, it is necessary to replace the original upper idler with a double geared. Jeowin's (https://www.thingiverse.com/thing:2328880) upper idler has an error: in vain, I pull the screws to turn and the belts loosen.
That's why I designed another one. Due to its construction it can not rotate and, in addition, its bolts are loosened, horizontally move, the belt can be loosened - strained
Since it is subject to heavy load, I recommend printing it with 100% f