Anycubic Kossel (not Plus) Lower Corner

Remix Of James White's Anycubic Kossel Lower cover and his very clever built in bolts.

Remix makes piece bigger, now sized to cover entire area between corner and bed on the "Standard" (not Plus) Kossel. Also moved the slot to allow the belts to pass during installation, narrowed that slot, narrowed the overall belt hole, and numerous other tweaks.

Goal is/was to keep printer cruft out of the lower pulley/belt area.

Works great!!