I just finished building my Hog Bipe a few weeks ago. I noticed you are using a Saito 91. (my choice also!), and I also used the dual servo set up for the ailerons. I modified my bipe slightly to have the appearance of a pre-war trainer with the blue and yellow color scheme. I decided to leave the headrest off since I thought it looked better without it. It was also my first 60-size kit. Looks like yours is coming along pretty well. Good Luck!

Len