Thanks for the advice and support
. Some time pretty soon I'll be attempting some more conventional planes and cold war jets with straight and trapezoidal wings, so I will definitely slow it down a bit and seek advice. I'm also looking around at other people's builds and designs and how they handle these types of planforms. I like the one you've chosen for the FTFC20, that's definitely a more challenging plane to build and probably even more so to fly for my skill level, but I can learn a lot just by seeing the process.
My next project will be a nicer version of my '39 Popular Aviation Special that lessens the dihedral to very shallow, and gets rid of the RET control scheme in favor of 3ch AET. I already love the way this plane flies even as RET with some slop, I'm thinking if I get it right, it will fly even better with ailerons. I also want to extend the rear of the fuselage out a bit so the tail plane is a bit further back, and possibly use a larger battery to compensate. I may use my 2s 1000 MAh, or go up to 3s and down prop a tiny bit and use a 20a ESC instead of 12. Going to try and make this one a bit cleaner and built to last better. The RET prototype is still running well though and hasn't had any issues, so I'll use an extra set of electronics.