I agree with throttle!! :-) ... We do have to fly them.. In some window..
and understand what could happen when you push it.. But rubberbands
should hold it.. You just have to have enough good ones:-) What's
enough??.. I guess, what it takes for how your flying..
Not sure what you meant by "permanent part" .. You know adding screws
and pegs, should keep it on, and it would be a quick fast fix..
These planes take quite a bit of work at times.. And they hang-in pretty
good