Gridfinity Mitutoyo Caliper Holder - w/bridging fix

Zach made some awesome caliper holders, but the hole for the magnet cannot be printed without major drooping and it's unusable without post-processing.

I used a version of this “3D Print floating holes without support” to fix the bridging issue in the holes. I uploaded the modified f3d source as well. 

The original file license: MIT License Copyright (c) 2023 Zachary Freedman and Voidstar Lab LLC Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.