I ordered some spares off David Silver and ebay to fix cam chain rattle. Bye the way - I got a refund off the dealer for the cost of the tensioner.
Everybody knows a Peter (or two), and here is a picture of my mates Peter_H and Peter_Z fetterling my Honda.
Peter_Z offered to take my head away and decoke. Also reseated the valves. Peter_Z had a nasty surprise in the morning, thief's broke into his garage and nicked power tools. Fortunately, the head was left untouched.