Been a year now using the Pop Up Gizmo's and were not to impressed, especially DW. We just use the top cover with the bungees. Does an okay job with keeping equal temperatures but as far a noise goes forget it.
Like what you have done, yeah wish someone would come up with a insulated cover that covers all sides.
Mike
2022 F-150 3.5 EcoBoost 4X4 Supercrew GCWR 19,500 157WB
Payload 2476 Maxtow 13,800 3.73 Equalizer 4 Pt Sway Hitch
2017 Jayco Jay Flight 24RBS
Old TV, 07 Toyota Tacoma, Double Cab, Factory Tow Pkg, retired towing at 229K. (Son now owns truck)