20' hull Roller Trailer Adjustment help needed

[SailorChlud]

Hello, Folks:

I am struggling to load my 20' Seafari onto the loadrite roller trailer and get it centered properly on the first try. In my neighborhood (NJ) we usually do not power load, as that can tear up the ramps. Winching the boat onto the trailer so that it is centered is a challenge, and I was wondering if anyone with a roller trailer can tell me the width of their rollers from outside to outside at the rearmost set? And do you have a keel roller or rollers, or not?

The pictures show the best of three attempts. I have tried backing the trailer to varying depths, from just at the water level to 6 inches below for the rear rollers and that did not make much of a difference.

I just have not found the sweet spot/combination yet, and want to launch and retrieve alone, but so far, have needed my crew to help on retrieve.