RE: Senior Telemaster
I had one forever, with internal bomb drop (quart beercan size), floats, bolt on wing, the works.
If I had to do it again, I would sheet the fuselage, bracing wires on the tail, enlarge rudder, do flaps and ailerons, lose the dihedral, and go with a Zenoah 20EI or an FPE 1.3 fully cowled.
If you don't sheet the fuse, it flexes/twists all over.
Bill