I'm in the final stages of building an Impact that was started over a year ago (other planes and priorities in the way...). I need to make some exit openings for hot air -- cooling the engine and muffler. I think about all the mods/additions from the other Impact build/post mortem threads have been included, but seeing the break in BrianB's fuselage go (what looks like) right through the cutout for the muffler stinger makes me a little nervous about whacking holes in the bottom of the fuselage. Any pictures of Impact undersides with cooling vents would be appreciated -- words of advice are always welcome, too!

Thanks,
Tom