I modified a Bachmann HO GE 70 ton switcher.
- Some black and brown wash
- Kadee couplers
- Removed footboards
- Installed prewired SMD 0402 LEDs with 5k6 resistors in the shell
- Replaced Bachmann PCB with GE Tsunami 2
- Installed sugar cube speaker in the front of the shell
- Added sheets of lead in the top of the hood
It is still a noisy engine but the lead in the shell reduces the amplification of the vibrations caused by the drive.