ICW Mast
I don't have a 40.5, but I do have a 380 with an ICW mast. It is 48.5 feet above the waterline(plus Anchor lite, Wind machine, windex, and VHF antenna).The boom has been lengthened (??? I don't know exactly how much.) and the roach area has been re-worked. It has approximately 90% of the standard sail area. It makes the boat less tender and, frankly, I believe it sails better than the standard rig. With more sail area down low more of the wind is moving the boat foreward rather than making it heel. With my boat, the flatter it is, the faster I go.A 50 foot mast will not get you under every bridge. My VHF antenna hit every I-beam but one when I went under the Brooks bridge at Ft. Walton Beach. I absolutely cannot get out at Destin. PERIOD!!!!! That bridge might show as a 50 foot bridge on the charts, but it is something under 49 feet! I had to go all the way to Panama City to get back out into the Gulf.The bottom line is I am very happy with my ICW rig.