I use polycarbonate on Kaizen on its shell panels (4mm thick box section steel for the structure) and on the front wedge (20mm at the leading edge to the floor). Held out fine in the recent Middleweight championships, even when hurling itself against a vertical spinner at one stage.

Its planned to be Under mounted Steel spider with chains at the end
Sounds unusual, I can't quite visualise that, got a drawing you can show?