Ok, I just test flew the Primus for the first time and wow am I impressed! For a plane that was designed more than 40 years ago it really does fly like a modern SPA plane. I had all of 5 minutes on the brand new OS 61 and had really not done much with the high speed needle or the idle setting but it did OK. I was only able to get in two complete flights due to the fact that the rear of my muffler decided to drop off into the woods. The engine went lean and I immediately landed. The plane took two clicks of aileron and one click of elevator to fly straight. I have added some tail weight twice to get the desired inverted pressure on the stick and a more axial roll. I really like this plane a lot and can't wait to expand the envelope some more. All in all a plane worth flying in competition despite its age. What was really a surprise was how fast it could fly yet land so slow.