What plane is this - guesses on the CG
 

https://cimg5.ibsrv.net/gimg/www.rcu...a766400cda.jpg
https://cimg6.ibsrv.net/gimg/www.rcu...5773628a56.jpg
https://cimg7.ibsrv.net/gimg/www.rcu...81714138c8.jpg
https://cimg9.ibsrv.net/gimg/www.rcu...14d0260177.jpg
https://cimg8.ibsrv.net/gimg/www.rcu...d3487301ac.jpg
I bought this plane as a trainer ($25 with 4 servos), 64” ws. It was set up as electric but all I had was a .46 glow so I put that in. The firewall had to be replaced, and I built just a little right and downward thrust into the engine mount. All my other planes are warbirds or sport and I'm not familiar with these types (i.e. Taylorcraft, Robin…). Anyway, I was going to put the CG at the forward spar of the wing but now I’m not so sure. Does anyone have a good guess as to where it would be?

Thank you

If the airplane has a constant chord wing, which it appears this one does, then a good place to start is at 1/3 of the chord. Measure the width of the wing, divide by three, and got back that distance from the leading edge.

^^^^^^^^^^ What he said.