Plantagenon

I've got a 2019 Quintrex Busta with a 30hp Suzuki on a standard Quintrex trailer that is made from 2" square alloy pipe. It has the standard 4 x 6" rollers on it and a skid on both sides.. The only issue is keeping the boat straight when loading it onto the trailer by myself. I have looked at a blue self cente roller for the back and will put one on. That will help a bit but as the boat comes up onto the trailer past the back roller it moves a little out of alignment with the next roller which means leaving the winch and pushing the boat across a bit. Would replacing all the rollers with self centre rollers help in keeping the boat straight as I load it? I have looked at other posts regarding loading but they referred mainly to an ezi loader set up. I could bolt some on but I'm reluctant to drill through the small trailer frame to mount them. Any advice appreciated.