What is the advantage of using the Eastern Beaver harness over creating a custom harness? Is it just plug and play? $60 sounds kind of steep for something that can be made from about $20-$25 in components off eBay / Radioshack.
The reason I'm asking is because I'm also doing the 599 headlight conversion. I have a relay feeding power to the lowbeam directly from the battery and using the license plate light circuit to switch it on/off. For the highbeam, I'm keeping it simple and using the OEM harness. Both lights will stay on when I flip the highbeam switch on.