I converted to an electric actuator , using new galvanized drum brakes , new bearings , seals , new controller in the truck used the origional coupler with lockout tabs, so it won't slide and installed new 8 ply tires spent 2500 on the trailer .
I am still 500 lb under the max. with the boat loaded would rather it be 1000 lbs. under , which would be nice. So an 8500/9000 lb trailer would be ideal