Rear diff housing as trailer axle - legal??

[RRV80]

I have a rangie rear end here, and what i am wanting to do is cut the bottom section out fo the axle and the bottom half of the diff pumpkin out, have a peice of round tube welded in it's place and weld plate over the top half of the pumpkin so it is enclosed, so it will basically look like a rear diff but instead of having the pumkin part in the bottom just be curved like the rest of it.

Then i plan on using the a-frame and trailing arms and coil springs under my off road camper trailer project. The big question is am i able to use the diff housing as a trailer axle legally in QLD.

[Blknight.aus]

yep, legal.

you can even leave the diff in so long as you shield the flange.

[RRV80]

ok sweet that is good to hear, one more question i have is regarding the I.D plate it has a section on it where it needs the axle load rating on it and it says "this will be stamped to the axle by the manufacturer" Can i just take a guess and put down like 1500kg or something and then even stamp it into the housing?