I currently have a Stratos 486sf with a Yamaha 150 four stroke on it. Looking to buy a Jack Plate and I spoke with Vance manufacturing and I wanted a six manual and they talked me into an 8-inch because of the way my transom is set up. Apparently Stratos and Triton have the kind of transoms where they taper in basically on the port and starboard side in the rear of my boat I sort of have Cadillac looking fins I'm sure I'm not explaining myself correctly so I'm going to post a picture of my type of boat. Anybody with Jack Plate experience please tell me am I better off with a 6-inch manual or the 8in manual thanks in advance