Cowl trimming help

Fellow club members. I have a project that I need help with. I am building a seagull models Ryan PT-22. Is there any one in the club that is good at cutting out the cowl to fit the engine that could help me, please? I live in Arvada not to far from the church at 55th and Marshal. My problem is I have never been shown how the best way to do it and I get it messed up every time. If you call please leave a message I will call you rite back. I get a ton of spam calls so If i dont know the number I dont answer.
Thanks
Art