How do you hold the 2.4 Ghz transmitter whilst doing U-control to vary throttle settings from take-off to landing ? A basic transmitter tray would probably work well I guess. Why not have the rudder operable to control line tension?
Why not have flaps and retracts and other scale features operable by RC? Wouldn't old time Ukie fliers have loved to have hybrid scale and stunt models with RC assist? Imagine electric powered RC assisted control-line scale models!!
No noise, no oil mess, no need for large open RC type flying field.