Been trying to get the center diff mount plate made. Had a couple of goes and couldn't get it precise enough. So cranked out a CAD drawing and had one cut by water jet locally. $40 AU including material and prototypes. Somehow i measured everything right and the first one was perfect anyway

. There are some small imperfections from water splash as the Al is too soft to resist but nothing that affects it functionally.
Test fit of slipperential and cross braces, feels solid. The cross braces overhang the plate a bit so that the RPM skid plate will fit in.