Hi,

Piston is still nice, clean and shiny. Compression still feels the same - its good as it should be with new piston, sleeve etc.
Mind you - i run a 15 cpx SMT engine and a 41 cpx HPI on the same fuel with absolutely no problems at all. These
engines are performing at least as well as others running "factory" Sidewinder, Tornado, Model Technic, Jet etc....

Will let you know regarding fuel in my CEN 7.7. I might consider going down to 20 percent nitro though since i have heard that CEN engines dont
like to run higher nitro percentage than 20...

Tks again - all your info is much appriciated - and best regards from Denmark

Niels