i was wondering if anyone is familiar with dominator jetboats. a buddy of mine has 77 dominator with berk pump, 496 650hp, place deverter no shoe and rideplate. its has a very violent porpoise above 60mph. is this something that this hull is known to do, and what do you think we can do to help it out. he will be machining for a shoe and rideplate over the winter. just looking for something to help the problem to finish out the season.