Thanks for the reply!
The spacebar issue is a bit confusing -- AFAIK every Leopold above the 200 has a problem with stem spacing, but the 200 is supposed to be compatible? Or is it only compatible with the 'universal' spacebar.
I have a white Leopold TKL, so I think (hope.) the blank black will look sweet on rows 2/3/4... Where can I find more info about the PBT caps??