shoulder set and easy grip for BL4

[J Costantini]

Hi. I'm about to shoot a project with an Arri BL4 and I'm looking for shoulder sets with two handgrips that are compatible with this camera. I've access to a shoulder set for a 435, would it be compatible? (even if the run/stop button doesnt' work..)

 

And there's another one listed as 'shoulder set otto nemenz', but I'm not sure how it works.

 

I could also use an 'easy grip' for a certain sequence, do you have information about it ?what about combining it with a BL4?

 

thanks