Hi JD.
The fix a multi-part one I believe. Ours is booked in for it in November. I know part of the mod it to install GIV hydraulic accumulators and there are some other items to be changed. I'll speak with our Chief Eng next week and get more info if you like. Sadly you need to book a long way ahead as the replacement parts are prioritised for the production line aircraft.
One footed braking is the answer right now, but which side? On ours the left brake is slightly less grabby, but it seems to vary from s/n to s/n
RP