Some progress.

After several test flights and trim adjustments I felt confident enough to fly the whole pattern with the Go Devil. That led to even more trim changes. The landings needed fixing so I moved the landing gear aft about an inch. I reduced the effectiveness of the flaps and got more down authority from the elevator. I think the flaps were disturbing the air going over the elevator. That was the biggest problem with the plane. I changed the stock muffler for one that is a half ounce lighter. I have a lot of adjustability in the balance of the plane. I just have to find the right combination. Now with the time change I have more early morning calm air to test in.