I bought a used MK10 with 2 G200 second stages in 1994 or 1995. I have no idea how old the regulator actually is, a shop was upgrading their rental gear and brought their regs to a scuba flea market to sell. I haven't had any trouble with it, it breathes easy and I've never had a free flow. I did put a silicone mouthpiece on it, I find the rubber ones quite uncomfortable.
The local shops don't service it but they can send it out for me if I don't want to send it myself.
Ber
The local shops don't service it but they can send it out for me if I don't want to send it myself.
Ber