I have removed the brace at the back of the canopy, and made to "hooks" instead, works perfectly. That enabled me to place the filling couplers for air and fuel behind the backseat.
I also made some reinforcements, particularely the "spine" from the vertical fin (the raised part) is very soft on the sides, that one got some carbon, made a lot of difference. Also the front part of the plane is soft, both the sides and the bottom, carbon there too (not too much to shield 2.4 GHz )
Cables and airtubing has been installed, planning the install of the equipment now (the Weatronic and the valveblock makes a nice and simple install!)
Thrustube for the P200SX ordered, so it's getting close