How much vibration do you get if you go with the solid racing mounts?
I did that once to a hopped up 3.0L 225. At idle and planning off you really felt it especially in the steering wheel. Definitely helped with the handling thought.
It helped a lot on my 1986 Black Max. Boat would walk some at full speed and trim. You could not get it to walk afterwards.
It sounds like something I need to do! Can the bottom be done without taking the top apart? I watched a video that said the way the bolts are in the bottom they either need to be cut or done at the same time the top is apart. I have a hoist, also a lift ring that fits my old Black Max, not sure it will fit the Opti. Just not ready to take the top apart yet.....