Had one of these a few years ago with OS 70. Would flat spin like nobody's business, but knife edge was difficult. Lots of coupling. Never experimented with dialing out using the radio. Take off and landing were great. Plane was tough! Flew into trees twice with very little damage. Plastic cowl can be made much stronger by using boat fiberglass (heavy duty) from Wal Mart glued in place using PVC pipe cement. Just use the dauber to stick glass on. Melts into the ABS stuff. Adds a little weight, but cowl will last a long time.

Mine had flutter due to too loose of a fit on the wood struts. Anyone else have this?

Finally gave mine away--didn't like all the set up at field and it would not fit in car fully assembled.

Good luck.

Greg