Don’t look too closely, I haven’t used this method before!
So I cut the back of the body bit at 45 degrees, I would have like to do this to the tailplane but the cf spar was to close to the edge.
A wobbly edge ensued, must remember to use a straight edge when I do the ailerons.
I then squeezed a beef of UHU Por along the top edge of both tailplane and body and let it dry for 15 mins.
I then pushed them together using a flat surface (the floor proved handy)
I hope it works because I like how neat it looks (from the top anyway!)