Hi All,
There have been calls for a way to make the IK Leslie speed switch and brake switch from a single mod wheel that behaves nicely with the brake at center area of the mod wheel. @Corky first spoke of it and he was right, it can be done in C3. I got to looking at it and came up with this solution using Cantabile bindings. The first thing to consider is that you want the bindings to be the only source of CC data to the Leslie plugin so delete any automatically created input routes from the main keyboard to the rack directly.
next move to the bindings page and create these 5 bindings
Set all bindings values to “Discard”. Now When you move the wheel into the sweet spot in the middle it engages the brake without setting off the speed switch (which by the way over rides the brake when invoked) and re-engages when the wheel is moved out of the sweet spot. The sweet spot can be made wider or narrower by changing the values of the bindings. Lastly open the options for the leslie plugin and make sure the latch options are Off and that the states behavior boxes are checked for the brake and the speed switch if not already done.
Works great on Win 10 X64 3543. It’s a workaround for now … hope it helps some of you!
C3 Bindings … the gift that keeps on giving! 
Dave