Here's my last update for the next week or so:

I flew another 6 flights today and I am really happy with the progress so far. The Bi Side seems to be converging much faster than the Episode and I am pretty surprised overall by how quickly it is trimming. There have been only very subtle things done so far. I have kept the CG at 130mm and have worked the control throws and slight mixing. I am impressed by the fact that it really didn't take any significant trim changes. Zero aileron trim, a couple clicks of rudder (more on that to come), and maybe 1 click of elevator.

It flies very true. I spent today making sure I had differential set correctly and trying to fine tune the small amount of rudder/elevator mixing required. This is similar to the Episode in that it takes a really small amount of rudder to elevator mix just off neutral. You have to tune that in with a Spline mix. You can't use a linear mix because it would take too much at the throw extremes in order to get the correct amount required off neutral. I think I have about 0.5% just off neutral and I carry that out and end up at about 1% at the extremes. I was lucky today that Randy was at the field an helped me keep track of my mix adjustments. There were very subtle adjustments required, but it ended up great.

I think I still need to add a small amount of right thrust. So, probably a 0.5mm (or less) shim to the motor mount will be added. It tracks fine but does veer slightly left at the end of a very long vertical.

I struggled a little in dialing in the axial rolls. I ended up increasing my elevator throw a bit since it is more dull around neutral than I was used to. That helped me out a lot. I also dialed my throttle back to top out at 80%. It was too explosive.

By doing this and slowing down the flight envelope overall I had a couple really, really nice flights at the end of the day. I was very happy with the F13 performance (awesome snaps. The reverse KE snaps are better than the Episode and it did the prettiest KE loop with roll across the top) and the last P13 that I flew was really solid.

I see no major issues on the setup. Incidence seems right on. CG is right where I like it. It flies extremely deliberately and has very good lateral stability. I think B.J. did a great job in testing and fine tuning this design.

I am going to shorten my aileron servo control horns because I have too much throw, and I will move the elevator servo control horn in one position. And, I'll add the right thrust shim. That's about it. The rest is just pilot acclimation. I was feeling pretty good with it at the end of the day.

Later.