Any condition is fine. Absolutely mint preferred, but otherwise I can send it away to get the surfaces machined. Mine just doesn't stay in tune at all (and has got particularly bad now flooding and intimidatingly running on 3 cylinders...). I'd prefer to not have it off the road though so if someone has a spare that'd be rad.
will have spare rocker sets complete will have to check condition cheers
I got impatient so just ended up ripping mine out and sending it to the shop. Wasn't worth tuning it again.