I have the Stromberg Carlson tray on my Keystone of about the same weight with a Champion 3100 invertor gen mounted on it. It works great. Strangely, adding the approximately 150 lbs of the genny and rack only added about 90 lbs to the tongue weight. No noticeable difference to any characteristics of towing or handling or WDH setup. I bolted the generator to the rack, and have been to a historically theft prone campground (Emma Wood in Ventura) and no issues. I removed the wheels and used angles on the axles and bolted through the front 'feet'. I had to remove some plastic cover and put it back to do the feet, a pain in the rear, but it stays there all the time under its cover unless being used. Like anything, if someone really wants it, they could get it. I would like to add a removable exhaust extension similar to the MH setup, but haven't gotten around to it yet and without front window don't have to have it. I do have to pump out the old oil with a hand pump when I change it since the drain is next to the trailer, but that only happens a couple of times a year.
I think the rack is a lot of money for what you get, but it fits and holds the genny, so it makes it worth it to me.
