I have an old Canon Lanc controller. The only thing it controls is start and stop recording on the BMPC.
Exposure, focus, zoom, etc, didn't work.
FYI. By no means is this an endorsement or recommendation, but I just did a little 3 minute stress test on a target I've used on my hacked GH2's and I was able to record raw on my 80mb/s extreme class 10 Sandisk 64gb card. It used to be almost 1/2 price of the 95mb/s extreme pro 64gb card. Now the dif is only around $37. The 95mb's have come way down in price compared to 6-12 months ago.
Bottom line is it looks promising that the less expensive card may work. Since I have 1 of each, I'll wait a few months to see if others get it to work and then buy another.