must be a run on qev's... i just bought the nexus upgrade kit which is extremely sweet but it didn't have the qevs in it. I called shorepaintball who said that the qevs are on backorder from planet.
as for the kit though. the rex dialer hammer is worth the 170 bucks itself, my brass velocity adjuster was always working itself back out so the dialer really solved a problem i was having. the rest of it is just to make it faster