Remote control for Canon DSLRs?
 

The problem I'm trying to solve is this: I'd like to be able to fly a Steadicam Merlin and adjust focus at the same time, perhaps with a remote control attached to the handle of the Merlin. The unit would have to be small, and pulling focus would have to be fairly straightforward (perhaps with a wheel). Can't really mount any gears on the lens, for weight and balance reasons; and want to be able to do it solo instead of with someone else pulling focus.

I can see several options when I enter these search terms into Google or B&H (Manfrotto and Okii,, for instance, make units that plug into the USB port), but I was wondering if anyone had any particular recommendations for what I'm looking for.

(Incidentally, the Moza gimbal also seems to have this functionality.)

Thanks for your help!

Re: Remote control for Canon DSLRs?
 

Would the DSLR Controller work?
Very simple to make wireless.