For a typical late-90s torsion spring replacement, a tech needs the correct spring wire size and length for your door's weight and width - Hayden doors from this era are consistent enough in spec that we usually carry what's needed on the truck. Opener swaps take longer, mostly because of wiring and safety sensor alignment rather than the install itself. One honest limitation: if your opener is a discontinued model from this build period and a part has failed on the board specifically, we may need to replace the whole unit rather than source an obsolete part - manufacturers don't keep boards in stock forever. We'd rather tell you that up front than have you wait on a part that isn't coming. For anything structural - bent track, damaged panel from an impact - we'll look at the whole door before quoting a fix, because on a 25-year-old system, one repair sometimes surfaces the next one.