I was into R/C when I was a kid (now 35) and when I was 12 I built a Great Planes PT20 trainer. I flew it a couple times with the help of an older flyer but I never managed to get proficient on my own and after I went to college it ended up in mom's garage.

Long story short I have the plane back now and am wondering if it is worth trying to get it back into the air or not. It has an OS .25 engine in it, it turns over freely but I am curious if an engine that has sat for 20+ years would even run still? The rudder and elevator are broken and the ailerons seem to need some work as well. The radio I know is all probably junk as it is really old Airtronics stuff on AM band, not sure if even the servos could be used still or not.

I know my construction skills were a bit underwhelming when I was a kid, but it still seems solid. Does the glue or balsa rot over time? Would I be better off just starting with an ARF and a new radio or do you think it is realistic to get this thing going again without too much expense?