Does anyone know of a repair service/person who works on Manfrotto geared (410) heads - preferably in So. Calif? This is a bit different than lenses etc. - but someone who has access to parts.

Or does anyone know how to open the thing up. I've had my Majestic apart several times - it's easy. But I don't want to jimmy up the cover plates or whatever they're called on the Manfrotto.