I think Big Vern and CTWV50 pretty much have it sussed... Mr Gibbs designed the framework of the seat back to soak up the torsional loads of the diff, so that's where we need to send them in this design too. If we can do that and get some vibration isolation (poly bushes) then it's win-win, jelly and icecream for everyone!
Does anybody have a 3d cad file of the Saturn chassis with a model of the diff in place? (SolidWorks, Inventor or the like)
I'm thinking of something along the lines of a bracket mounted at 90 degrees to the right-hand seatback upright then a mount along the lines of Skov's diff nose mount but with 2 polly mounts fixed a 90 degrees, spaced a good distance apart to spread the loads acting under tension and compression...
Skov's design looks really nicely engineered but the mounts will be under shear forces when they're designed for compression (and I think they're rubber)
http://1.bp.blogspot.com/-rANr4WQ7IX...unt_fitted.jpg
http://3.bp.blogspot.com/-MVpVJo0hIs...t_fitted_2.jpg