Versastack-10 Corner Compartments

I recently purchased a Versastack 10 Compartment Small Parts Organizer to put all the gears and pulleys that go with my Lathe style rotary (I use it for laser engraving). I noticed that there were voids at each of the corners that were just wasted space. After taking all the measurements, I designed the storage box in TinkerCAD, used Matter Control to make a mirror image of it (I'm sure that TinkerCAD could do it, I just haven't figured out how yet) and then ran it through PrusaSlicer to fix the errors and generate the G-code. I open the G-code file in Matter Control to print the file on my Ender-3.BR-FL stands for Back Right - Front Left and the other is Back left - Front Right. Print each file twice to fill all four corners. I had been doing all my designing, editing, slicing and printing from within Matter Control but was having random first layer issues. PrusaSlicer has resolved most of my print problems and TinkerCAD has some design features that Matter Control doesn't. It's all a