Ok so after a few weeks of testing my board. I have two things.
1. Would there be a way to make the Fn button act as a windows key on a short-press, but FN for holding? I have it ingrained in my head to use the left windows key for Win+R and many other windows functions.
We'd need an idea how to implement it... Since you only know if the press is long or short after you've released the button:D
The best I can think of is to delay the keypress until either the threshold has been reached or the key was released before it, in which case press and release events have to be sent instantly.
2. \\ not sure if that's the cap or the FW \\ It's been like that since day 1 \\ these were brand new blue switches \\ so I don't think there's anything wrong with them, but I could be mistaken since I seem to be the only one with the \\ problem. \\\\\\\\\\\\\\\\ granted, now i can type \\ twice as fast
Which FW and OS are you using?
There's a bug in the linux hid support which causes something like that (2 codes mapped to this key). Not sure this is the case here, since this rather caused immediate key release behaviour...
EDIT: on the other hand the solution to this problem is to send both codes at once, which may, in turn, cause windows to freak out and see the keypress twice... I don't know.