Notes to self...

     LF  RF  LR  RR
FWD  X   X   _   _ 
REV  _   _   X   X 
CWR  X   _   _   X 
CCW  _   X   X   _ 
FWL  _   X   _   _ 
FWR  X   _   _   _ 
BKL  _   _   X   _ 
BKR  _   _   _   X 

FWL  FWD  FWR

CCW  ???  CWR

BKL  REV  BKR

PSI  ???  SND