Ok looking much better.!! . . . Take it you have decided not to weld.? If so Not saying this is bad thing if that's what your most comfortable with but will be a lot more work and maintenance. Mixture of both works best IME.

Only thing I see and question is DO YOU really need that much adjustabilty of the bed.? If not then I'd raise the lower frame and increase the triangulation. Will just help stiffen the frame a little.

Crack on.!!