I have the chance to fly yesterday. I did the following. Hard mounted the rear support of the contra V5 as suggested in the contra RCU page. Also improved the canalizer support to avoid flexing. Very simple fixes. I will post a picture later. For sure hard mounting the rear support fixed all trimming issues I was having earlier. Also moving the CG back helped to eliminate the rudder coupling to the canopy as Jordi suggested. When flying knife edge holding right rudder there is almost not mix required. Just a little down. With left rudder there is rolling tendency to left. I still working on this. The usual 2% down elevator down mix at lotthrottle was need it too. For now would like to fix that rolling tendency with left rudder. I was surprised to see the plane tracking so well moving the CG back. I know that I need some more trimming flights but it is getting closer. I think I am going to try more rear CG following Jordi lead. Interesting is that the plane tracks extremely well with contra and moving the CG back. I don't think I need stab fences so JM did something without adding fin area. I think the larger anhedral stab is doing the trick combined with rudder shape.
Last edited by vbortone; 06-22-2016 at 06:30 AM.