Regarding Pete's install (which looks awesome), isn't the connector only as strong as it's weakest/smallest point? If you trim the height to fit flush against the floor, then wouldn't it be the same as just using ~1.5x2" box tubing? I know welding it to the floor helps, and you could do that as well with the 1.5x2" connectors with well placed outriggers (specifies in MP chassis manual)