I don't know how I could have done it, but today I discovered that I sheeted the central section of the tailplane 4 cm shorter than the fuselage saddle!
Too bad! This will delay a bit my progress and, luckily, I didn't replicate the error on the wing root!
I'm going to dislodge the sheeting and add two extra ribs to support the new covering.
Thanks Cem for your abatement. I wonder how the span of my model compares with the tail of your Jigé! I bet there's not much difference!