Gary Allison at Brison has production squared away, and it should be no problem getting one. I have a Brison 3.2 in a Kangke Laser @ 16.5# and the vertical is unlimited. It will accelerate straight up from a hover to flight speed in about 2 seconds and continue to accelerate till my old eyes can't see it. I'm using a 22/10 Pro Zinger, A 22/8 Pro actually performes a little better but its noticably louder {a problem here in north west NJ}.