By the way, after this flight I checked the airframe and I found out the skin has completely detached from the formers behind the gear doors opening.
Good thing, thanks to this forum, I reinforced the glue joint of the leading edge of the skin with a fillet of hysol and a few screws through the skin and into the wood, or it would have ripped off.
Time to hysol the rest of it, I guess...
I am going to make a few holes in the trailing edge of the fuse to reduce the pressure a bit also. And should bother with gear doors...

I didn't fly particularly fast and yet it got damaged. Cannot imagine what would happen on a high speed pass!

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