Hi Dan. I hope that file I sent helps, but keep in mind, I rebuilt the camper framing corners (Travel Queen likes yours) into some pretty beefy stuff before I EVER added those through bolts, and interior nuts, and tie-down eye bolts tied in too, and using interior steel custom made brackets and exterior aluminum sheet to sandwich those rebuilt corners. And yes I just LOVE my electric jacks on the corners and have abandoned all interest in the OEM Safe-t-jacks which still lie out in my field. But! If you can forget about using the camper corner (as found original because they are nothing but sketchy 1x2's) do the connection for weight and strength as it looks like you're doing. Use those under wing steel grids! Tie in to 'em! They are the real deal. And your three-jack mounts may well already be tied in to them. And I agree, a tripod style under these (one jack on one side and two on the other) may well be the best balancing act available. Except you already have the new jacks so use them and that Travel Queen 10.5' is heavy! My 8' is heavy enough. But yeah - keep it as level as possible. You'll get the feel on how far at each jack you can go before you continue your circling around the camper to the next. It makes for a good walk. Like I said. I'm now loving my electrics. Good luck. And yes we'd love to see some interior pics!