You might again ask Mr Wheeler same question.
Although original intent was to have scale like models flying scale like sequences -- the rules have relaxed
Basically:- If it looks like a 300L to most people - it is close enough. It is NOT a scale detail contest.
If you call it a 300L and nobody else seems to think it does - (the contest director gets to decide ) then be ready to show some proof that it really is a 300L and the contest director can then decide if it is within th 10% INTENT of the rules.
Some of the popular models declared IMAC legal-- may be IMAC legal - look sorta like the full scale craft -- However a number of em are out of the 10% dimensional restrictions noted.
This isn't just idle opinion.
check the numbers .