Glenn & Debbie, Your box gave me good visual for deck storage. A few days ago, I bought a similar looking diamond plate chest to yours, off Craigslist. Its deep enough and tall enough to hold my Champion generator, dry toilet system, misc dog stuff, digging tools and anything else I want out of sight. It measures 56" wide, 19" tall and 28" deep. Its aluminum so extremely lightweight, I can move it by myself. I told Carey if it doesnt work I'll sell it for what I got it for. Thanks again for sharing photos of your mod.
2012 FR Flagstaff T12SDTH
1996 Shadowcruiser Pop Up Truck Camper
1967 Newell Motorcoach
2003 Ford F150 5.4 V8 Triton Super Cab
2004 Nissan Titan LE 5.6 V8 4x4 Crew Cab