Multi row header helper

I wanted to make a header helper that would work for a whole board of headers. Tested on 2023 SAINTCON bag of holding and the 2019 SAINTCON two row expansion board as well. This board is about 105mm x 92mm in size. This is also used as a helper and optional holder for my smaller minibadge display board (4x4 board). May be able to hold other expansion boards as well in the groove if they balance when in.

*Will not work with official SAINTCON store 10x10 board