Hi Mark,
A couple of thoughts.
I can’t say with certainty that all BFD3 drum kits use completely consistent mapping, but I have confirmed that drum maps for 8 widely selected presets from the Core Kit match up with presets from Crush, Dark Farm, Horsepower, Jazz Noir and Oblivion.
The BFD3 manual includes a short chapter titled “BFD3 Key Map Reference” which lists the default key mapping used by the software.
Paul