I found it. I would think it'd be even simpler with my classic, as there would off the shelf parts to work with for the doors, and the white steel compartments themselves.
The only questions I have, before cutting, is which areas are void of any hidden "stuff" before cutting.
I know the streetside is off limits, as there is large conduit running the full length, forward of the wheels.
Curbside, there are some gas lines for the furnace and stove which disappear through the belly pan and may interfere. I think there may only be one area forward of the axles and one rearward which are "free".
Anyone had a 30' Classic with the belly off?
"If the women don't find you handsome, they should at least find you handy." - Red Green