Why not be safe and cut out the hole more (up) so as not to take the chance to ruin your motor.
Cos i this is the correct cut out according to the bits on the original cowl!
Nice looking cowl[8D]
It looks bloody awesome! done by the incredible Dr. Jason
So light, that and the canopy save over 100g over the original GRP and clear cowl and canopy.
Ill go and make a baffle (if thats wot that bit of balsa is?!?!) and glue it in with a bit of epoxy then ill get some photos of it in the air tommorow if the wethers ok.
Ian