Robert, the ZN cap is basically a cap minus all the special features (read: problems) of the cap (like the mounting of stab & wings on the fuselage). I have watched quite a few videos (ok, videos don't serve justice to flying) from TOC and such events, and I personally think it's very boring to watch. People roll 'too far', lines are not parallell etc. Some of this is certainly because I've only been watching it on video, however, the flying style in IMAC is very different than that of pattern, and hence, the planes are also different. The reasons for me liking pattern more than IMAC is just personal taste and the things I'm used to..