/ THIS GOES FOR ANY EQUIPMENT WITH KNOBS, PIALS, LEVERS OR SWITCHES! 1. Unlock first if there's a control locking device. Pressure on a locked control may put it in a shop for repair. 3 Stay home on the range Trying for lust one notch more or less than the rated range is lust asking for trouble. This type of "fudging" for a little extra may soon cause you to get nothing at all. 4. Never finger your way past a stop point. The best you can get from this is fuzzy operation and early breakdown. And your arm could get twisted by a statement of charges and a payless payday.