Quadtwirl gyrotor revived !

My old quadtwirl is revived after its maiden 2 years ago. The torsional weakness is now solve with a piece of 1cmx 1cm balsa running along the fuselage.

Motor now upgraded from 100W to 250W outrunner that runs at 3s/ 20A with a 11x4.7 propeller. THe elevator will be mixed as Delta to provide more roll control. If I were to strengten the rotor, I would insert CF rod + tapes need the rotor blade root.