That made me salivate!
Just yesterday I've need a Hex 1.3 (or more precisely a 0.05 inches) for my recently acquired Lambda PSU. Never need it before, and I guess I'll never need it again, but it's rather showstopping if you don't have the bit. I had to file a hex key.
I have Wera, Wiha, Facom, and Proxxon screwdriver sets.
Facom are OK. I largely prefer their mechanical tools to their screwdrivers.
Proxxons, to be frank, are rather underwhelming. I like their powered minitools, but I cannot say the same for the screwdrivers.
I have a Wiha SlimVario. Nice, but a bit annoyed that they are not compatible with standard bit holders.
My preferred set is a Wera set. Super nice finishing and durable.
BTW, is rather amazing to see how easy is to strip small screws with the incorrect bit. Screws these days seems to fit bad and be made of putty.
Cheers,
Dan