All of this goes away if the whole absurd idea of some arbitrary weight requirement being a part of the rules is eliminated.

Again, the size of the plane is defined. The noise limit is defined. Those two factors alone will do what is needed to keep the dreaded 50cc or 2 by 2 by 2 meter plane from appearing. The whole concept of a maximum weight makes no sense at all to me.

Sure, there are endless arguments that can be made once you decide it matters, but if you do not use that as your starting point it is very hard to understand.

Perhaps tune up the measurements a bit more, like max fuse height & width if need be and be done with the whole weight issue. Heresy I know, so burn me at the stake!!