I'm looking to pull the trigger on the Clutch for my Scarlet, after a lot of thought it's the perfect shoulder rig.

However, I want to be able to add a Follow Focus and Mattebox to the entire rig. From what I have read on the site this can be done, can't be done, honestly I am completely confused.

So I have two questions:
1) Can anyone tell me what pieces I need to allow me to add a Follow Focus and Mattebox to the Clutch?
2) Can I use 15mm or do I have to use 19mm?

Any help would be greatly appreciated as I want to purchase everything sooner than later.


-Shiraz