That's an awesome project you're working on! I tried CL flying 40 some years ago when I was just a kid. Didn't work out too well. Never got off the ground! LOL So I just have my old Cox Sopwith Camel hanging from the ceiling in the man cave. Would love to see your plane running.
Lol....My first plane was a kit ,it crashed on the ground run ,all of that hard work was gone in a matter of seconds!
But I didn't give up ,I so much still wanted to fly an airplane ,so I bought a foamy plane ,an transfered all of stuff over
to it.
I tried the ground run again ,but I was so nervous an after several attempts ,I finally got mad an picked it up an tried
just hand launch it ,so I revved the motor up an gave it a nice over head throw ,an it just took flight ,well it fumbled
around a little until I got a hang of the controls ,boy was I nervous ,but I finally got to fly.
Then after that ,I figured out it can be hand launched ,an started throwing it when I went to fly ,it got easier every time!
It was a 36'' cesna with the Os 15 engine.
As far as your CG goes, remember you still have to add servos, battery pack, Rx and a fuel tank. The rudder was fixed and all you had with the control line was the elevator.
Yea ,I know about all that!...
This plane here has fully functional rudder all ready ,but no control rod ,it has a fixed adjustable rod with a clevis
to adjust the rudder ,who ever built this one knew what they where doing!
Lol...I honestly thought that control line didn't exist no more ,they still build them an have competitions with them!
Its crazy how they can do the maneuvers an racing them with 3 people together!.....Watch a vid....Its funny as all get out!....

LOL....Check this one out ,its the racing one!......