My first post -- I am starting a new project, building a 2013 60th anniversary Corvette. Just acquired a set of Cup Wheels from Gravity Colors(Palmoz 1/25 wheels) and the directions state to 'trim .5mm' from the ID of the donner kit( Corvette ZR1,Revell). My concern is how to do this in the most effective way, without having a 'jagged' cut line. I'm thinking about using a compass or circle template to measure and draw the .5mm cut line and then use a very sharp xacto blade and try to cut out cleanly. Want to know if you have any advice on the best way to do this. appreciate any help, Al