Okay, here's the flight report. Basically, they worked! The knife edge is much improved as it locks in now and doesn't hunt like it used to. The coupling has mysteriously vanished as well. As for the roll rate, I fly on low rates most of the time, but when I switched to high rates to try some rolling harriers, I couldn't use full aileron. It was simply too fast. Landing speed is the same. I did make a cg change at the same time, so I think that may have helped in the KE as well.