What started out as a routine replacement of two door torsion door springs for $185 ended up close to $400. The technican kept on coming back to advise that drums were bad, then the plates, then the door rollers are bad. Was told that if I don't replace these parts the door will come of the track and land on our vehicles. I took their word for it however, I have never heard that happening to anyone. Scare tactic to buy unnecessary parts ?