When you say you designed the HP24 as a non-serious racing machine and mention it can't run with the ASG29 by what degree do you mean? Is the drag coming from the airfoil rather than the fuselage or both? If so, could you design and sell a more competitive airfoil for 18m config? As a larger pilot I like the 304S because of the roomier cockpit (I haven't seen it in person but I'm told it has a roomier cockpit much like the older 304C).
/Chris