Looks like yer making good progress! Be sure to study yer work and do more brainstorming/thinking before progressing on. It can keep yer costs down and provide less waste in materials.
I set goals fer my belly pan...
Allow fer easy installation/removal of the belly pan when maintenance is required
3 segmented sections to allow fer access
Rigid frame to allow fer sectional panels
No additional holes in the frame or body (use existing holes/frame/supports)
Ability to return to stock configuration quickly
The addition of the aluminum flashing on top of the belly pan (under the exhaust system) has eliminated melting/distortion of the Coroplast. However, it's also reflecting heat back on to the floor pan. I have to add some aluminum flashing on there to make a heat tunnel...
