Dj, it all sounds more difficult than it is.. Take a look at the Model Software, Evan Designs, web site. They have already wired, AC/DC 7-19 Volts in 3MM bulbs (LED) that are perfect for what you want to do. Here's a pic of a WIlliams F-7, I upgraded Headlights, running lights and tail lights.
No need to worry about boards. You hook the red wire to your rollers or any red wire coming up from the trucks. Hook the black wire, to the frame. It's that simple. Not brain surgery, or rocket science. Here's the website. No affiliation, just a satisfied customer.
