Info from Users on ZHIYUN CRANE 2 Appreciated

just wanted to hear back from some ZHIYUN CRANE owners

I've heard the one rated for 1800g doesn't preform well with DSLR cameras on them even under 1350g.
can anyone confirm.
I want to use with A Canon 6D with standard 105mm lens.

also best place and price to buy the 1800g and 3200g holding model. can't find any bargains. assume 3200g is the best bet but sooo much more $$$