Puzzle-style regimental sqaure base, made in the size you want.
Demo on TikTok https://www.tiktok.com/@suhland_workshop/video/7216353523854740742
In order to have a solid assembly, the adjustment is very fine, remember to deburr your parts well for a better assembly and especially disassembly.
Original base size 20mm and 25mm available
28mm print at 112% from 25mm files
35mm print at 140% from 25mm files