i have a shorelandr' roller trailer for my 18' lund tyee, and it is a real pain to center on the trailer in the current of the river. the boat centers between the rear rollers, but often turns and missses the center rollers towards the front. (not bow rollers) i was thinking of putting bunks instead of the rollers in the rear, but maybe i just need to make some small bunks to guide the bow onto the center roller. what do you think? prob 2 foot sections clamped to the trailer would do it. shaped in a vee, and installed with boat on trailer.