I just bought a 2008 Jayco HW12 and the seller put on a new coupler. He told me it needed a $50 part called Demco reverse break lockout for the surge brakes actuator, i was told by my local shop it would cost between $250-500 so i went ahead and bought the popup. Fast forward to now, they are estimating it to be minimum $675.00 or 5 hours of labor and said that once they take it apart it could be even more. I found a DIY video on eTrailer and the guy did this in about 15 minutes? I also found info that says it takes 15 minutes per tire/brakes to bleed. I declined to have the service done and now they suddenly are tacking on a $135 diagnostic charge which they never told me about in the first place. Am I just a dumb blonde in their eyes? am i being played or is this valid? also I found out if your PUP is under 6k lbs you don't even need brakes, why didn't' they tell me this?