This Shoulder Rig is very customisable, and can be rearranged a number of ways. I've also found it to be useful with or without the accompanying balance weight.
It offers several areas to mount other accessories to as well.
I am missing the quick release plate which can be found for $10 or less, which I considered when pricing this for sale.
I love this but I have 2 of them, and normally only use 1 of them, if even that these days, therefore it must go.