KlickyKlacky/BoxTurtle Magnetic Door Latches M3 Nut remix

Using the original, I ran into a few issues - 

• The heatsets are in pull-out orientation, which isn't ideal, especially if using an auto driver.

• The final magnet flush-ness was extremely sensitive to the heatset placement - if the heatset wasn't perfectly level, then the magnet would be veery noticeably tilted

• Swapping heatsets to try different sizes was slightly too much work

• The print orientation was vertical, and this led to occasional cracking when securing to the 2020 with an auto driver

• The clearance of the little fins was slightly too close, such that even the short end of a roll-in nut would bump a heat set insert.

So the changes:

• M3 nuts. These will pull in and align themselves, and the insertion slots are hidden when actually mounted. They slide in and out cleanly.

• Designed to print support-less on the wide side. This improves the compression strength a little in the two relevant dimensions, instead of being extremely strong for the magnets, and useless for the mounting.

• Alignment fins slightly adjusted to allow an entire M3 roll-in nut to fit.

• Magnet holes are bumped to 3.2mm in depth, as this is what mine were measuring. 

• Added some fins on the "back" of the unit, so they tighten snuggly against the 2020 instead of tilting backwards

BOM, Per Unit (You will need 2 units to make a linkage, and probably two linkages per door.For 4 total.)

• 4 10x3mm Countersunk magnets.

• 4 M3 nuts

• 4 M3 FHCS

• 2 M3x10 SHCS

• 2 M3 Roll-in / M3 T-nut

Sizing is intended for ABS with no shrink adjustment. It's fine if you do, the hardware will just be a little more tight.