One thing I noticed was that the Non drive side cup was thinner than the drive side cup, but didnt seem to be thinner to the extent of 2mm.

Currently I have a 2.5mm spacer on the non drive side, but I think you could be correct. I'll look into it with the BB a little more. Maybe measure the overall distance with this BB in the frame and a normal Shimano hollowtech BB (The cranks work in a shimano BB)