I use one lwb version, it's coming up to 2 years old now with no issues , easily handles a 500lt tank and all the bits.
I had the old model bought new in 2006 and sold to Dan the man (my son in law) in 2014 and I believe he sold it (as he wanted bigger as he does gutter vaccing as well) to someone on this forum in 2018. It was excellent with a 400L tank and had a payload of 736kg.
When I first started with Dan the man for the first 6 months I towed a trailer with 200L in it as well!
It was only the 1.3 version (which had a cam chain, not a belt that needed replacing) too.