Improved Levitator Base for Bambu Mag Lev Kit

Note: This is meant to be useful for anyone wanting to make their own mag-lev models based on the Bambu Maker Supply Kit. In playing with the Bambu store Mag Lev kit (here), I realized that the included "base" for the maglev levitator has some annoying modeling aspects that make it print poorly. I fixed these in CAD here where I created a sacrificial thin wall to make the little snaps work more reliably, and I rounded out the odd flat portions, among other fixes. This should fit with the original provided cap, but I include that here as well to make sure you have the matching part. 3MF and STEP included. Boost MeIf this helps you, boosts sure don't hurt me :)