A year ago we installed this very simple and cheap device to help us centering the boat on the trailer, here seen with AMFI in place. After eight succesfull retreivings I can tell that it really makes life easier.

It is made out of scrap pieces of 2x2 wood and two pieces of plywood, about 6 high, fastened with wooden screws.

The opening is about 2 wide, just like the CB. This would probably work as well for the 260.