The biggest reason Rubber Bands give problems ? Some planes do NOT have the posts sticking out at least 1" to 2" on all 4 corners.

Oil and zippy turns cause the wing and body to shift around. Every few tight turns a band hops off unnoticed. Then it is history as they seperate.

Once you can pull a loop or 2 with confidence and land OK. Figure out or ask someone to convert to a bolted in wing.