i took my first ride on my venture 1100 today, i installed the moflo grate a few days ago. while it made a huge difference as far as the ski staying glued to the water, i am now getting cavitation. i sealed the plate in the rear like the directions said with some silicone i got in home depot, and waited a few days for it to dry. if i punch it from a stop now, it gets pretty bad cavitation, and then hooks. the stock grate had some foam on the back of it, the new plate didnt, do i need to add some? is this because i didnt use marine silicone, or did i not put enough on? i did put a lot i thought. any ideas?