Hey Geppino
i replyed to your email Bud,i forgot to send you some pictures,i will send another email with the pictures and hope you can help but the hole in the firewall sounds like a good idea,but to acomodate the engine in there i would probably have to shorten the engine mount standoffs,i juat didnt want to do that since they have a good sturdy flange for them to sit nice and strait,i'll see what i can come up with,i would really like to hear from anyone that has done this but till now i havent seen or heard of anyone using the DL 50 engine in the great planes 1/3 scale pitts special,im sure it can be done with alittle imagination,i guess i dont have it in me,well not at the moment but i'll think of something