More usable space when magnet holes are disabled.

[arma26]

With magnet holes disabled, I'd like to lower the floor of the inside of the container to make that space usable.

I'm currently using https://www.printables.com/model/514480-gridfinity-bins-for-small-parts for 1x1x3 small part bins and the floor of this bin is much deeper than a similar bin created using this project.