FLSun_I3 X Axis Upgrade belt Tensioner Upgrade
thingiverse
I strengthened this part after realizing the tensioner had a tendency to rock or wobble. I added reinforcement to keep it from moving, forcing it to slide smoothly into that rear channel instead. This is still an untested modification, as I haven't installed mine yet. You'll probably need to attach the belt to this piece first, because the spacer takes up space underneath (compared to the original) and makes it easier to link up and secure the belt properly.
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