We put a new axel in the old trailer the original was too light and they were slightly strained the new axels are 50 mm box they wouldn’t fit in the heavy wall60mm so we boxed the angle ours have the old type Muge jacking system a winch mounted on the side of the trailer pulls up the back of a leg one one side a torsion bar goes across through a tube to the other side to turn a leg on the other side. We made the drawbar removable on ours aswell because there is loading gates on both the front and back. The axels are rated for 1300 kg as far as I remember I can’t remember the wheel size off the top of my headThat would be great if you could put up a few pictures of it.Did you remake the axles in the mudge trailer?
The suspension stubs i have bought have a square section 50x50 x 200mm long, I think i understand how you done the stub axles from your description, its a good way of doing them, if 50mm square two pieces of 60 x 60 x 5 angle would make the cross beam into which they would fit.
What size wheels have you on them? Is the draw bar removable?
I intend to make the trailer 8ft x 5ft, how are the legs done at the front for lifting the trailer?