v-core-3 y-endstop for more travel

thingiverse

Replaces the original y-endstop, which robs you of a couple of mm in y-travel even when set all the way back. Instead, this mounts directly to the top extrusion of the inner frame (see picture), allowing you to move it way back. Note that, if you're using dual 5015's, this may not reach forward enough to trigger in time (but in that case the default endstop will work fine anyway).