Hi mate. I am going to try and help you with this.
Could you tell me specifically which switches you bought and which parts you took from each to create the frankenswitch.
Also tell me if you have lubed anything, how much and with what.
Cheers
EDIT: I can tell you now already, if your problem is the top housing being to tight, and you are using Alpaca v2, this top housing will not fit the stem, so you can use for example the top housing from this switch instead: Durock Silent Linear. Given that the stem is a NK Cream Stem