A torsion spring under tension is not a project to learn on, full stop - that's true in Newcastle or anywhere else, and it's the one piece of advice that doesn't change by zip code. Where local numbers do matter is deciding whether to fix or replace in the first place.
If your opener dates to around 1999, when most Newcastle garages were built out, and it's throwing intermittent codes, replacing it outright is often cheaper over five years than repeated board repairs on a unit that old. If the door itself is sound and it's just a broken spring or a bent track, that's a repair, not a replacement, regardless of the opener's age. We'll tell you which one you're looking at over the phone before we quote anything, and we won't push a full-door job when a $150 part fixes it.