Oh I nearly forgot! Regarding the exhaust, I would love to use the standard exhaust to keep the cost down but it doesn't fit in the cowl! [&o] Did you mention somewhere that the exhaust volume for 25 to 30cc engines is 700cc? I will have to design something that fits in the cowl and send my drawings to Wackerengines. I would prefer a Pitts style so the exhaust exits at the rear of the cowl but they don't really look very efficient with that sharp right angle bend?!? Am I right in thinking that way?

Rich