RE: What determines right/down thrust?
Good information Ben and Britbrat, thank you.
The vertical stab/rudder is 60% above the fuselage and about 40% behind. I am also considering continuing the rudder below the fuse for added area. I would surmise that this would additionally reduce the amount of right thrust needed due to spiral slipstream.
The thrust line is indeed very close to (but not directly on) the chord line being only aprox. 1cm higher. Gear and wheelpants will be added drag below.
Given your info, I will probably build with only a degree or so, if any. I will need to test fly and make any adjustments before final construction of the cowl which lines up very closely with the spinner.
Thanks again!