I had the shrigg rig, but sold it due to not using a 35mm adapter..
However I was debating getting a set of rails because I still have a wide angle lens and mattebox I am using and didn't want to put too much stress on the threads. And I might find other things to mount to them.
I really like supporting these independent products like Indifocus. My question is does the indirails pro come with any sort of mattebox support? I am looking at the pictures and I do not see one.