Since us Super Tigre lovers are few and far between, is it too late to cut in a top hatch - just in case you ever part with it to one of those egg beater power modelers? 98% of the hobby market being electric these days (give or take) who got lazy with foam in a box, won't have a brain aneurysm about converting it over to EP. You can get a lot more for a model the day you retire it if there is an access hatch on top for their lipo battery. I know I know, stop cussing, I'm with you, I'm just thinking ahead.

Remember when you could buy any width header from Mac's website to match your fuselage? A header and pipe cost more today than the engine itself. It's now a hobby of improvisation, and what Dave Platt called years ago, the principle of scarfology.