The reason I used the trailer lights was because I couldn't find the bare socket, and I wanted to save my turn signals in case I changed my mind later. I found out later that Autozone has the socket.
I do like using the dual filament bulbs. That gives me a few more options. I decided to use the dimmer filament for extra brake light. But I was looking at it the other day, and it looks a little funny with the brake light being so dim, even though it's bright in the middle. One day I may put in a better system to use the bright filament for both turn and brake, like a trailer converter. I can make one with just four power transistors, if I have my design figured out correctly.
Another option would be to order the amber turn signals from Japan. Then my only brake light and running light would be in the center.
I've even thought about putting a brake light on my helmet, but that's another story. Maybe I'm just paranoid about getting rear-ended.
Curt