Re: 7 position strat switch
That sounds like a lot of trouble for nothing. Do a test bed and see if you really like those positions.
I've told this before but I used to want all kinds of stuff in a guitar. 3 motherbuckers, splitting all coils, blending them in, volume and tone for all, series, parallel, phase... somethings are just not possible, practical or good sounding. I didn't even get to try such a thing, the price and the realisation that such a thing would be hell to control didn't seem to be worth it.
Sometimes less is more. Go for Artie's suggestion if you just want more combo's, maybe add a few push pull pots to get you series parallel if you want to mess with that.
My 1ct (not even worth 2cts LOL)