Spacer/adapter insert for Sig Sauer P365 9mm magazines, for use in the Maglula "UpLULA" speed loader. This improves handling with the smaller (yet semi-double-stack) magazines, avoiding the "slop" in the UpLula when loading these magazines.
UPDATE: After using my original P365 adapter for a while, I noticed some occasional problems with the cartridges jamming "nose down" because the cartridges were being set to the back of the loader with the narrower magazine of the P365. The metal pressure tongue (depressor) forced the bullet-end down, causing the jamb. Therefore, I modified my design to move the magazine more forward in the loader, so the pressure tongue presses down in the middle of the cartridges. This worked much better! I call this the "box" design update. See the files with "Box" in their name - both the P365 and the Shield designs use this.
Also, I've added a version of my adaptation for the S&W M&P Shield (box version only) and single-stack 1911 magazines.
The original adapter I created is based on the design by dacinator (M&P Shield) & willwiser9 (9mm Springfield) for their inserts - thanks, both of you! I've re-modeled my adaptation from scratch in FreeCAD, to support the dimensions of the P365 magazine, and to add a few minor enhancements in fit.
If necessary, the small sloped tab at the bottom end can be modified with a file or sandpaper to "fine tune" the friction fit of your specific print in your specific UpLULA. Remove the insert by pressing down on the insert through the top of the UpLULA.
I've included all my CAD files (for FreeCAD), so you can make any changes you need for your specific tolerances or printer.
I used a brim with nGen by ColorFabb filament, using 3 layers (2 inside, 1 outside).