Pacbrake now has a ECM bypass for the 05 w/ a 48RE tranny. They say will work with their standard exhaust break. After reading their web site I thought I could use the new PRXB, but they said the 48RE could not handle it & use the standard exhaust brake. Does anyone have a Pacbreak w/ECM set up on a 05. If so how do you like it,how long have you had it & anything to look out for?