Library i/o type

OK, thanks. Will try it. I'm confused though what is the variable type num_wires ?
Also how does arduino know that I'm referencing max with:
max31865_numwires_t num_wires = MAX31865_2WIRE;

do I need to use max.max31865_numwires_t num_wires = MAX31865_2WIRE;

the max is instantiated: Adafruit_MAX31865 max = Adafruit_MAX31865(53, 51, 50, 52);

Thanks for the quick answer and your patience,
Keith