So I measured once, measured twice, measured again, glued, measured again, and everything was looking good.
Then I noticed that I had messed up my reference marks on the wing -- the outboard was 25 3/8" away from the fuselage side, the inboard was 25 3/4" away from the fuselage side. Worse, I was running on a headache that day, so it was lost on me that the distance from the inboard side to the tail post was 34 1/8", while the distance to the tail post was 33 7/8" (think of that as "one eight inch different from 34 inches" and you may see my mistake).
I only noticed it after the headache because my wife noticed the wing wasn't square -- I remeasured it to show her it was too right -- and damned if it wasn't wrong!
So -- everything has been ripped out, measured correctly (I hope) and re-glued. I had to beat up the stab a bit to get it out, but better than a crooked stab -- and it straightened up nicely with a bit of water insinuated under the covering and ironed with a Monocoat iron.
I've got the guide tube for the flap tweak mechanism in place, and all the bottom sheeting on.
Now I just need to get the hatch details figured out. It'll run from nose to behind the cockpit, per a picture I saw of -- I think -- one of Denis Nunes' planes. Mounting details involve -- uh, plywood and screws and pegs and stuff -- yes, that's it, all that. Real mounting details are to be determined, but it'll be cool when it's done, yes it will!