In article ,
Montblack wrote:

PROBLEM:
I only allowed 60 lbs for "Everything else".

Granted the S-33 is a 10 place jet vs the single seater MontJet. Still,
their "everything else" is DOUBLE the weight of their
wings+fuselage+engine(s).

The MontJet "everything else" is only 1/5 (21%) the weight of the
wings+fuselage+engine.

Hmm.....?

A) helium-filled inserts in the wing?

B) install only a pilot that is equipped with a large supply (self-contained)
of 'hot air'.