Boat in question is a Horizon 180 with a 5.0 V8, 2800# or so in weight, my trailer has 4 bunks for the boat to sit on and the new 4500# hoist I just bought has only 2 bunks, 1 on either side of the keel. Is that enough to properly handle the weight when the boat is on the hoist or should I some how add 2 more bunks? I do understand you probably need 4 trailer bunks only when bouncing down the highway.