Has anyone tried a 26 or 27 Trophy on a 721/250 Merc? If so did you have to use a blow-out ring? I feel for sure you would have to plug the PVS holes solid. I know when you have alot of torque and a heavy load and an over and thru prop on take off it will blow all the water from around the prop and you just spin out and set right back down in the water. Hate to make a trip to the lake high as gas is not knowing....Thanks