I use both freely Black market with the beltboxes mod. I use beltboxes just because of the working loaders 1x1, so i have deactivated the beltboxers and the incompatibility lock and it work not perfectly, but even more.
Could I suggest to remove the incompatibility, but add a note in infos that can cause a crash if used with beltboxed option active in that mod?
Beltboxes can be deactivated using its options, then you can go on without problems.
BTW, sorry for have edited the mod, but I havent change anything, just removed "incompatibility" part, that's easy to do.
I hope to have not broken any copiright rule...