I just recieved more power regulators to add into my manual doors. Where do you guys get your Rollers from?? Mine are worn.Do they supposed to have play in them or what?? They seem loose but the wheels are good and round, just need to know if they are supposed to be nice and tight because I bought a set from the help section at O'reily's and they came 3 to a pack. One is nice and tight on the rivet and one is loose on the rivet like the ones are on my regultors. I want to do this right. Thanks!!!