Many many thanks to everyone, your all making me feel a lot better about this, Im very grateful, but Ive always said this about Bluemoon, its a very special place, Ive been helped a few times here as I know others are continually.
I had a choice between a Pigs valve and a mechanical one, I chose mechanical because it lasts 30 years plus, whereas the Pig valve only lasts about 9 or 10 years then you need the op again, I dont want to face this again, but the drawback of the man made one is you have to take Warferin forever.....which means no more than 3 standard drinks a day......forever, my drinking days are over chaps :(
I'll still make beer though, just not drink so much.