The reality is that unless you want to spend the $$ for a 30% or larger plane you will not be successful in IMAC. Even though the rules say to judge the geometry - there is an absolute bias against smaller planes. How do I know - I was told by 2 "professional" judges who had judged the TOC that my maneuvers were "small" and my pace of flying was quicker, and therfore not scored as well. (this is with a 72" wingspan plane). Smaller plane = smaller maneuvers = bad scores??? Never was I told that they didn't like the geometry - the only parameter that is supposed to be judged. Like it or not there is a "WOW" factor that is judged. IMAC is going the way of pattern in a fast way. How many people want to spend thousands for a 30% plane and engine and thousands more for a trailer to pull your plane in order to be competitive? If they want it to be a large scale event, that's fine but don't fool the new guy into thinking he can show up with a .60 extra and have the slightest chance to be competitive regardless of how well he flies.