Well I did find one fault over the last week. DO NOT use the included retracts.
My P47 snapped both on take off. It actually plowed two furrows in the ground as it rolled forward on the stubs. Wire in the retracts was installed only approx 1/8" into the body of the retract mechanisim. Approx 9 pounds of bird on a grassy field was just too much for them.
No real damage to the bird itself, and I have a bigger set of retracts on the way.