The one thing I don't like from the original model is, that it is not stackable. Especially when you consider, that for e.G. resistors, you usually get rows with 16 values for each row, and then the next 10x multiple of that row. The 1x5-gridfinity-base-rail has 18 slots for containers, leaving one at each end free, when you stack up a value-row in it. So I designed endpieces, that allow stacking another row on top. 

I have quite deep drawers, so not beeing able to stack the SMD-parts would be quite wasteful for me, I assume this also applies to others. The modules can be used with any length of those rails, but it works best if rails of the same length are beeing stacked on top of each other. 

The model contains a left and right version of the stacking-module.

The orientation of the models are already well printable. You can use supports, but however, you don't have to…