Arduino set parameters

I am ready to start using a sketch that has been pre-written for use with a BLDC motor (see attached txt file) but will probably want to make adjustments to the min duty cycle which is set near the top of the sketch. Is there any reason why I can’t set the minimum to 25 (10%) for greater power control? Also, given that a sensorless motor doesn’t operate well at low rpm, what are the optimum settings for duty cycle and delay to get it up to speed?

Thanks