Been reading around the subject on various posts on GTT Alain and I agree with what you say as I always take the view that if a job is worth doing then do it right the first time especially as the engine will have to be taken out and dismantled so logically I would look at doing the valves con rod etc... The key thing is that the engine 'runs' and got compression so I am happy with that for the time being. I am thinking of attending an evening class on basic engineering skills such as valve lapping etc as I would like to extend my knowledge. I think you can actually take your own engine with you to work on.