The standard for all aircraft in the sport catagory as well as the recomended location for inital test flights in the aerobatic catagory is 27.5% of the mean aerodynamic chord +/- 2%. 33% is considered by most to be in the 3-D range and I don't think your speedster will like it there. At 20-25% it will track like its on rails but you may run out of elevator authority at lower speeds just when you need it the most. I would contact the manufacture and verify that number it might be a typo.