Originally Posted by Berchmans
Actually I built my RV8 per the plans, mounted everything including wheel pants before fist flight, everything was mounted dead nuts straight. I can fly with my feet flat on the floor with no rudder trim required what so ever, even doing a Hoover roll, no rudder needed. Check everything being straight first. I once had a water rudder out of alignment on my float plane with played **** with rudder inputs.
Mine also cruises with no trim, although it is just a thin fraction of a ball off. Built to plans. Just the slight weight of my relaxed right foot is enough to keep it perfect. I also found that if you are going to split hairs this fine, you better make sure that your slip-skid ball is actually mounted exactly level in the panel.