Which Mod Lens Gear Do I Need For...?

[Polanski]

I"m using universal lens gear ring.

http://jag35.com/dgear.html

And I have this cavision follow focus:

http://www.bhphotovideo.com/c/product/626615-REG/Cavision_RFD15BC_RFD15BC_Basic_Mini_Single.html

The gears don't adjust properly.

Which of these gears I have to buy for the universal lens gear?

http://www.cavision.com/followfocus/gears.htm

Please, anyone who have gone through the same situation...

Thanks