I am looking for advice in cutting cowl flaps into a Top Flite F4U Corsair .60. I have seen this done but haven't figured out how to do it just yet. Marking and cutting the flaps in the base cowl ring isn't the big problem. The problem comes with opening the vents. What is the best way to bend them out, so that they are "open"? I am hoping to gain enough exit venting to avoid cutting a hole in the bottom of the forward cowl. (I know the rule of thumb is twice the exit volume as the intake volume). If anyone has done this or has a good idea as how to do it, I would appreciate some help.

JAGMI
AMA 710081