Thanks jettaway - i didnt actually use any hypo however i think to get a perfect result on the top one some hypo would have to be used as theres a couple of black spots still there.
Andy, good luck mate! Remember your wellys and waterproof trousers. I didnt and came home soaked - its a yanmar diesel 15lpm 200bar. I purchased it off Rob it was one of the 3 he had for sale.
Mitch