We diagnose before we quote. For a 2004-era opener, that means checking the circuit board, the drive gear, and the sensor wiring before assuming it's a motor problem - a lot of what looks like a dead opener out here turns out to be a $30 part, not a full unit swap. If the drive gear's stripped, we replace it; if the board's failed, we'll tell you honestly whether a replacement opener makes more sense than sourcing parts for a model that's aging out of production. For seals and rollers worn by heat cycling, we replace the weatherseal and swap steel rollers for nylon, which holds up better under repeated hot-cold expansion. One limitation worth saying plainly: we don't stock every opener board model on the truck, since Four Corners units span more than one manufacturer and era - if yours needs an ordered part, we'll tell you the lead time before we start, not after.