Thanks Richard....I had guessed 100kg for the chassis and 200kg for the tub .........
I have dismantled one of my trailers in the past, whilst manhandling both chassis (wheels off) and the tub, the chassis was about the same weight as the tub, I could just lift the chassis so probably just over 100kg, the tub is too awkward to lift by yourself but rolling it over gives good indication of weight.
So perhaps 50/50 split on weight........
Regards