Could you add support to allow for two different slab types to be placed within the same block region?
e.g. normally you can only place two of the same slab in a 1x1 block area, I would like to request a feature that would allow me to place two different kinds of vertical slabs in that same 1x1 block area

I may make this as a separate mod to be installed alongside the main mod or something, as I don't think it would fit in the base mod.

This has been something I've wanted to do for a while now though, just not had too much time to look into making it