Just checking in on this thread. I generated my first set of cups this weekend, and tried them out. They are bubinga, and just about 1.75 inches deep.
I think that they are too deep - not only cumbersome visually, but also the bass has reduced. Comparing the stock plastic cups with these, I need to go from bowls back to cush-s to get the bass I want.
I may cut them down to 1 inch, just to see if it is the depth, or the material itself.
Fun experimenting though!