---

A few (more) trailer questions :). I have a 1988 Montauk 17 with the trailer in the following images that I would like to optimize:

https://flic.kr/p/oiBjfW,
https://flic.kr/p/okmzoV.

The trailer has two main rollers per the photos. I would like to optimize the trailer by:
(i) replacing the two main rollers with 12" Stoltz ones with (greased) stainless shafts, and
(ii) ensuring the boat weight is supported by the rollers and the bunks only serve for balance.
Questions I have: (1) are only two main 12" rollers enough support for the boat/keel without the bunks sharing any of the weight?, and (2) is this trailer worth optimizing?