Enclosed/heated underbelly questions.

[gearhead]

I used perforated angle steel (has slots and holes) across the frame side to side to help with the sagging. You should be able to get it at a good hardware store, or Lowes, Home Depot, etc. I think I used 1.250" X 1.250" angle, maybe 1.5". I connected it into the frame with the same size self drilling self tapping stainless steel screws that the factory used. Got them at Fastenal. If you screw into the same general area the factory used you should be good. I used a 1/4" cordless DeWalt nut driver. Grind the corners off the angle so you won't cut your head open the next time you roll under it. Paint it flat black and git on down the road.