I am literally in the process of stuffing some boards in this engine. The buck convertor requires a full wave bridge if you want to power it off the three rail track. I had a 6 amp bridge thats attached to the convertor. The Blunmi was too wide to mount on the chassis so I had to place it in the shell requiring many more connectors for servicing. Next step is to see how well it receives signal in the diecast shell. If not well plan B is to mount it in the tender.
Pete