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Old 17th December 2019
  #9
Lives for gear
 

And you could use an 'inverted LED' strategy for indicating that the user is int he 2nd set of banks. ie when in first set, bank A, LED for button A is lit, others are unlit. When in 2nd set of banks, bank A, bank A LED is unlit and LEDS B-H are lit. When in 2nd set of banks, bank B, B is unlit, A and C-H are lit etc etc.