Hi About your slash keys, until you find them you can always copy mine, here: \ and /
i got my blank hhkb pro2 yesterday, for some reason took me 30 minutes just finding a website with the layout, usualy that's something i've been finding in 2 minutes lol, even if i never usualy have to look at the keyboard, with some keys and layout being in new places, id say getting used to it is quite a 'reset' of habbits
Here's where are my slashes:
I use 1-3-5 dipswitches on, i think this corresponds to hhkb lite mode or something like that, from the default settings, this gives me the following results, the default delete key replaced by backspace, and the alt keys close to the space bar, and the Fn key at default location, with windows set on english settings for my keyboard, my / key is the first key to the left of the right shift key, and my \ key is, starting from top right corner, the second to the left, none of those 2 slashes require me to press Fn or Shift.
All this is on windows, i don't have a Mac right now, but if you have to test or compare some settings, just send me a PM, i'll be back as soon as i'm done this last minute shopping