A friend of mine has this boat and it seems to porpoise really bad, no matter if it's trimmed all the way down and trying to cruise at 30-40mph being the worst. It's up and down like a yo-yo. Has 4 lead acid batteries in back and powerpoles, 1/4 tank to full tank of gas doesn't matter. Tackle is moderate weight in front. Running a 25 t1 propHyd jackplate up or down doesn't make a difference either. Whats the deal? Any suggestions?