Just discovered trimmer potentiometers!

I can’t believe that I wanted to swap out through hole resistors before! Now, I’ll be using two trimmer potentiometers, one to change the sensitivity of the hall effect current sensor and the other to change the reference voltage.
The schematic shown here still has a few issues (VR2 has too wide of a range). I’ll also need to redesign my PCB and this time I’ll be using all SMD resistors. I don’t trust my hand soldering skills enough to use 0402 sizes, so I’ll be using the larger 1206 footprint.
Other changes include changing the op amp configuration to an instrumentation amplifier, using a new op amp chip with 4 op amps (although I’m only using 3), and adding another transistor turn of ALL the power (except to the microcontroller) while the sensor is off.