This is the bare PCB you need to build your own 17mm FET driver!  DIY parts kit available here.

This PCB is 1.6mm thick with heavy 2 oz. copper and red solder resist.  Same parts as most previous MTN-17DD drivers.

Parts Required:

• FET: LFPAK56 N-Channel Mosfet
• D1:  SOD-323 Schottky diode
• C1:  10uF MLC capacitor, 0805 (X7R preferred)
  • Populate CZNR instead of C1 if used zener modified
• R1:  19.1K, 1% resistor, 0805
  • Use 36K 1% 0805 resistor for 2S or 3S zener mod LVP
• R2:  4.7K, 1% resistor, 0805
• UI:  ATTINY13A MCU, SSH or SSU variant
• Z: SOD-323 4.3-5.1v zener diode
  • If zener diode is used:
    • populate CZNR instead of C1 with 10uF capacitor
    • replace D1 with 200 ohm resistor
• Spring / LED leads
• OTC:  1uF MLC capacitor, 0805 (X7R preferred)
  • Pad with side closest to MCU can also be used as electronic switch pad (no OTC installed).

The layout is the same for both 17mm and 20mm FET only boards.