I have never had a problem with the 5645's. I have five of them in a 29% Giles with over a 100 flights and those same servos were in a 1/4 scale Extra that experienced a mid-air. The Extra had over a hundred flights and before that, they were in a 1/4 GP Giles which I was thrilled to finally total as it was a piece of junk. I just changed the gearsets when they went into my new Giles. I also have them in my Reaction 54 and they have never had a problem.

Marty