I decided to mess around a little with lens stacking a little as well. Truth be told, I totally forgot about it until this thread. I messed around with some Triumph Adler and Alps dyesubs and doubleshots and my tactile Green Alps. Since I'm importing them on my laptop, I have no clue how good or crappy they are since they're full size and unedited.
Alps Doubleshot from Xerox keyboard:
Alps Dyesub from Xerox keyboard:
MX Dyesub from Royal Alpha:
Inside of PBT caps from Royal Alpha (the numbers appear random. My guess is that they have multiple numbered molds and this is so they can identify issues with a mold):
Doubleshot MX from Royal Alpha:
Alps switches from Xerox keyboard: