adjustable and variable length legs for making frag racks out of egg crate.

multiple middle sections can be printed and added to increase height.
pieces and feet can be adjusted to fine tune.
multiple layers of egg crate can be sandwiched to make 2 or 3 tier racks.

"top_nut" attaches the leg securely to the egg crate.
"riser" forms the mid section, each riser adding 3-4cm to the height.
"foot_bolt" provides a foot - not absolutely necessary - allows further tuning.

standard versions provide .25mm clearance in threads. (should be fine in PLA)
the _35 versions add an additional .35mm clearance for .6mm total. - this may be better if printing with PETG.