AW MAN!!! I can't believe I forgot the BOOSTMONKEY!!!
It uses your factory EBC (factory solenoid) by controlling the bleed! You can set the boost inside the cabin using a dial... cost is 4times lower than a standalone EBC and it works just as good!
Check them out: www.boostmonkey.com
Or make a search on Boostmonkey, you'll find TONS of posts about it.