thanks, great links!
Still hope Frap Tools will make some Plus modules like 10hp and 20hp,
would be rad

Actually I only know those ones

Fraptools Plug: not really "modular"

KAHNCO Modular: the best one I've found, but the guys don't respond to emails
and there's no place to purchase it...probably never launched

SP-1: the only real modular-modular case

do you know other similar projects?