Almost bought an F450. Inner payload monitor said NO

Speaking of DOT numbers, I have to submit my bi-annual report to the DOT. I run numbers on my 350 SRW. Have to. When I pull my GN, I'm over the 20K GCVW threshold that requires DOT numbers and a log book and DOT physical but in my case because I haul Intra, I can self certify. When the TC is in the bed and I'm using the truck for non-commercial purposes, the DOT numbers come in handy when fueling. I get the commercial truck fuel discount when available.