Shape BP8000. See http://www.shapewlb.com/en/product/products/shape-support/baseplate-seri...
Shape handles are legendary. You can get the cheaper handles that mount on the rails and save $ there. I like the them on Shape camera rig built in rosettes.
EVF mounting rig from Solid Camera for the FS700. Best there is, bar none.
O'Connor "O" Matte Box
Genus Superior Follow Focus
I am selling my rig above if you are interested. You can find me here: http://www.squaredeal.ca/square_deal_productions/Contact_Us.html
There is a few shots of our FS700 shoulder mount rig as described above on this page:http://www.squaredeal.ca/square_deal_productions/square_deal_productions...
Noise shooting 2K RAW at 240fps is a potential deal breaker. The noise issues are horrible and consistent if recording to an external recorder via SDI. You need to shoot with bright diffused daylight and even then it will haunt you. This camera suffers from the lack of the low pass filter which Sony eventually fixed the F5/F55 for an additional "upgrade" price. You can fix it with noise filters, and to tell you the truth it looks nicer overall and more cinematic if one processes it this way. What was a fix for noise issues turns into a method you can tweak with to make your images look more like 35mm film; pixels are smoothed by the process in eliminating noise. No more too digital sharp, hello a cinematic look. Try it. Incidentally, the FS700 loses its dynamic range in 4K RAW and requires bang on over-exposure by 1 to 1.5 stops, or the noise from its flavour of sensor will dance in the darker areas creating little visual joy. It's a great camera for the price, if you know how to shoot it. But it's really unforgiving if you don't. It is performs in spectacular fashion when you shoot S-Log2 and super-sample down from the 4K sensor and record to an Odyssey Q7 as 1080 ProRes HQ - some of best HD footage capture by any camera out there in this config.