Well with a profiling machine at my disposal and able to cut 20mm thick stainless steel plate, I've had 2 plates cut ready for machining. I have spare manifolds supplied by Tony (thank you) and a project is now in progress. I will be making 2 different designs and the program's used on the cnc machines kept (in case they are any good). Just need to see when to pull the engine out and ask nicely for some help.