Well I've managed to make a replacement in slightly thicker neoprene than the original and this puts more tension on the spring thus more pressure on the seal, thus finally no more leaking.
A great outcome in the end and I'll do the same to all the other Kirby Carby's that are fitted to various Scotty's.
Cheers, BB.
I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.