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- Fix diode silkscreen on the bottom of the board
- Remove R1, replace R2 with a smaller value for more current into comparator
- Q1 should have 1/2/4/6 and 4 swapped
- Ultra-fit and Dura-Clik connectors instead of Clik-Mates
- Add passthrough for relay sense line (shorted when relay is closed, open circuit when relay is open)
- Fix voltage drop with MOSFET stages
- Add hysteresis to avoid bouncing
- Add an NAND gate between negative input and comparator output
- Try to increase voltage going into opto-isolator. Around 2V right now due to voltage division
- Consider using non-tented vias or through hole test points. Some TPs were ripped off
- Also don't put TPs directly on a trace as if it falls off it takes the entire trace with it