I angled them upwards only slightly as I had to find a sweet spot there - travel of the damper perfectly covers travel of the stick. Little too much up and damper will be unable to fully extend, little too much down and damper will not fully compress limiting the travel of the stick in both cases.
Test results : DCS & XP helos are good. DCS & XP fixed wings are doable but realy strange feeling with this kind of controls 
As I mentioned in the other thread, for the stick these two dampers are too stiff imo. But it will work for now.
But you know @troll, all these experiments only discloses that I have to continue to the final solution : Baur’s dual-cam design ( used in VPC WarBRD ).
As I see it dual-cams could serve perfectly for both helos and fixed wings - cams with no-center will provide enough precision around the center for fine handling of the helos and the springs centering force will provide the needed feeling for the fixed wings.