Doing the rough layout of the chassis, a few things are threatening to cause analyses paralysis.
Firstly - the positioning of parking jacks.
What is better, pointing in from the sides, at an angle from the corner or forward from the back?
Moving the last interior cross member back a bit should form the 3rd mounting point for the jacks. For the side facing version, 2 longerons of 2x2 tubing should do the trick.
And then, what is the best spot to attach the A-frame to the chassis? Ending on a cross member, before or beyond it?
I need to get it all ready for welding by Wednesday to make my new timetable for first camp in December.