The belly pan can be shorter than where
the cat is, and if the cat is sheilded with
metal heat shielding it should be fine, just
be sure the heat shield is still on the bottom
of the body so it won't cook your feet
And the metal mesh you are talking about is
expanded sheet metal, it's like a cheese grater,
and I've got the scars to prove it, I used some
on a motorcycle muffler/expansion chamber
and went down wearing shorts

Ouch
Wild