Since you need some more trainer time and have not even ordered the radio yet, I would go with the rebuild. Of course I realize you will have to spread out the 4* to dry after you get done drooling all over it but that won't take long.
Seriously, look over the instructions and see if it has dual wing servo instructions. If not, let MinnFlyer know if cap strips are used on the ribs so he can provide correct mod instructions for you. Keep the instructions and plans out, you can read and study them later tonight.
Then close it back up and finish your repair work on the trainer so you can fly next weekend. One project at a time until you get proficient at this. Assembling a kit takes space and time without the distractions of a repair in the middle