K40 Laser - upgrade Potentiometer for finer laser power tuning HD

I swapped out the 1000 ohm potentiometer for a 500 ohm one and a 500 ohm resistor to get better laser power tuning in the 0-15 ma range to help dial in the picture engraving ability into wood. The upgrade utilizes more rotation of the knob than the original. 2 500 ohm pots for $12 https://www.amazon.com/RV24YN20S-Potentiometer-Inverter-regulation-control/dp/B074KBX9RZ/ref=sr_1_8?ie=UTF8&qid=1541725719&sr=8-8&keywords=500+ohm+potentiometer