Anybody have any experience with Outboard Hydrofoil Stabilizers such as Stingray, Doelfin, etc. Got a Montauk 17 with a 90 Merc two stroke and have a portside stern mounted electric trolling motor. Hear the hydrofoil stabilizers save gas. With the gas prices climbing considering mounting one of these on the outboard? Wondering if they really save gas and if there is any negative impact on the trolling motor other than clearance between the wings of the stabilizer and the trolling motor? Normally run the trolling motor with the 90 Merc up to cut down on drag. Do the stabilizers really keep the bow down and cut porpoising? Which of the stabilizers work best?