The thread you posted is of a Racegun karni, not an eblade. If you want to know about Raceguns I'd head over to Customcockers.com and talk to Nuke or DarkAppolo. I've never owned one, but they're rather tricky and temperamental by reputation. The MQ2 is too, for that matter.
bizzarodog is in the right ballpark with prices too. All the parts you'll need will run you $600+, and you'll need $200+ in work done to the gun.
I've never been able to tell the Eblades apart by the side, but I think an E1 board won't be able to run an MQ valve. It doesn't have enough adjustments.