I don't own one (yet), but I don't think this engine was designed to rev. Rather, I think it is more in the line of a trials motorcycle engine. Low speed tricks and lots of grunt. Much like my Jett .76L; a two stroke that thinks it's a four stroke. Some folks seem to suffer from monomania: rev, rev, rev.
Putting a high revving pipey engine in a 3-D or sport plane makes as much sense to me as using a motocross engine in a trials bike.