Zoom Controller for Panasonic X920

Hi,

I am wondering if anyone out there uses a zoom control for X920.

I have recently bought one (Helin R1 DVX) but the 0.25mm jacks dont fit into the minjack 0.35mm of the camera mic/headphone port. I have sourced a 0.25mm-0.35mm converter but still not even sure it would work on that camera. 

I have looked at the Varizoom ones but again not sure they would fit or be compatable with this camera. 

here is a link to the user manual as reference

http://service.us.panasonic.com/OPERMANPDF/HCX920.PDF

Any help would be appreciated. 

Many thanks

Stevie