My trailer has electric brakes. I was going by the load rating supplied with the paper work. Though the 4,500 listed in the link above sounds more in line with my initial expectations. I was very surprised the 7000 lbs rating.

If it wasn't for the $ needed to install the hitch and wiring, I would have tried it already. But I'd rather not spend the money to only find out it can't do it safely.

Hmmm, as usual. Nothing is ever an easy decision.