Hi Wayne,

Had two good flights on sat. More power than I every had before due to being able to lean out better in the horizontal plane, and no cut outs due to leaning in the verticle plane or when the fuel level drops, and that was a HOT day, 28 deg and 99.99% humidity (there was condesation on the carb on landing!)

I think if one can reduce the fuel flow restriction by doing the mods we did, and keep the tank close in to the carb, then theres no need to restrict the exhaust outlet further to obtain more pressure. If its not possible to get the tank close enough, a baffle like yours should certainly help matters.

I would now say that the GMS is performing comparably to my Irvine 40, in fact it starts better and is half the price, so Im very happy!!

Thanks for making the info available on this thread. I would still be struggling and cursing GMS otherwise!!
Regards,
Mark