Just sorting the mechanisms out before putting them back in my doors and there is an issue with my window regulators. The gear appears 'jammed' in each of them, these are the gears that attach to the actual winder handles. The mechanisms have been wound so far that the teeth from the scissor mechanism are not engaged with the gear. When trying to re-engage them it's clear that some kind of spring or retainer has come out of the gear causing it to not turn. My question is, is it possible to re-attach this, has anyone done it? Or is this wishful thinking and my window regulators are knackered and I need to source some replacements? Any help much appreciated, if pictures better explain this I'll get some.