Gridfinity Battery Tester Holder

I couldn't find a Gridfinity base for my basic/generic/cheap battery tester but I needed one, so I used a base platform from [this collection](https://www.printables.com/model/226535-gridfinity-adapters/files) by [atucom](https://www.printables.com/@atucom) and put a simple box on top of it. My tester measures 42x26mm, and it's a snug fit when printed with PLA on my K1C. If you'd like to adjust the fit in Tinkercad, [be my guest](https://www.tinkercad.com/things/b6c4iL30Ael-gridfinity-battery-holder?sharecode=C6uHtXAIoC0XtAMWoLO6taUcDU4A1R2XnohdGUd6Dhg).

I didn't need supports or a brim, and normal printing settings should be fine. You may want to check dimensional accuracy on your printer, or use the setting where the inside walls are printed before the outside walls so that the box doesn't get too small to fit your tester.