Blue ox here for over 10 years.
Check the vehicles manual to see HOW you must tow your toad.
When deciding which braking system to use?
If I had 'do overs', I would NOT use the Brake Buddy type that you have to hook up to your brake pedal where you have to get on your knees to shove that darn thing in between the seat and brake pedal and then adjust it, etc, etc. And reverse process upon arrival.
I found it to be a REAL pain literally in the back!
Research or use forum members suggestion on the type of newer braking/tow system that is automatic and all in one.
Good Luck. You will be very happy you switched from dolly to 4-down!