I m waiting for 10 pin Sony Lanc connectors. I think it will be available within 7-10 days.
I think it would be work with XF300/305 because XF300 and sony use same Lanc protocol codes.
New Variable Zoom Speed RC Shutter for Sony/Canon/Panasonic prototype is finished and tested 3 different sony camcorders. It works perfectly. We are looking for lanc supported Canon and panasonic camcorders for testing. Also 10 pin Sony lanca adaptor cables on the way. And after it will be available for order.
Have a Canon XF300. I could buy a proto, if it works brilliant. If it doesn't, we refund the purchase and you get a beta test out of it. Just a thought.