Updated my belly pan. I was missing some panels since the accident last spring, and decided to make it more complete with some nice $14 4x8' coroplast panels my local Home Depot started stocking.
I may put it on ramps when I get home to get some better pictures, but the new pan is a 100% smooth sheet from edge to edge and from front to back, with the panels overlapping like fish scales.
This is a view from the rear: