Hi Guys,
Been following this thread for ages as I build/Finish the assembley of an Impact.
For what it's worth, I chose to use the engine cowl horizontal edge to determine my zero attitude line. If you do this, you will find that the pre-determined marks on the rear of the fus for the stab joiners and anti-rotation pin will result in the tail incidence relation will be zero degree's, then just slide the main wings on to the carbon joiner and set the incidence for them at that junture! I am currently setting them at .25 degree's for the first flights, can anyone reflect on this set-up regarding the up/down lines when flown?