Stackable variant of the Gridfinity hot end assembly holder.

Changes: V2.05b added 1/3/2026 Added holes for extra nozzles and reorganized everything reducing height to 4u (32.4mm)

Current Issues/concerns: v2.05b: Stacking lip is shorter than the typical 4.4mm at 3.8mm due to use of a bin generator.. doesn't seem to impede stacking but i had increased the height by .6mm so it may not be quite to 4u specs when stacked. input here would be appreciated!

v1.3 was made from an imported stl so the fillets are a little wonky and isn't to gridfinity spec (37.668mm)