I'm always nervous about someone rear-ending my rudder since it sits pretty far back from the trailer bed. I have the Hobie Red cover, but it's still a concern especially in the dark.
So I had the idea to rig up a third brake light from an led tail light. Problem is it would blink with either the left or right turn signal. After some searching I found one hitch cover light that had an eliminator circuit so it won't flash with the turn signals. It's the Bully CR-007A Tail and Brake Light. It's the only I could find with this eliminator circuti. I was hoping it was LED, but it's old school incandesent. I tested it out and it works as you'd expected a third brake light. The only difference is that it does flash where you 4 way flashers are on, but I'm good with that.
Connecting to the TI was the next challenge.
The is a photo of V1. It works, but it's ugly. Now I just needs a splitter and a 25 foot trailer wire.
No damage fortunately.