I think jackplates are worth it. Or a portabracket. Ive run a 30' scarab CC, 28 Baja CC, 28 Century CC and a 28 Pantera all with twin outboards. I currently have the pantera with 250's 25" shaft and a porta bracket. Its great for adjusting in different sea conditions and weight loads etc. It also helps for shallow water and reducing drag. I can have the bracket all the way down and shoot out of the hole, then trim it up and reduce drag and pick up about 5 mph. PLus when i leave my boat inthe water overnight, i can lift up the engines enough to tilt them over the transom and get them completely out of the water.