I have only run my blackman a few times (26 billfisher bought from Charlie), but a novice question on the trim tabs. i am running the engine tilt at -4 or -5 and had the bow all the way down and it ran terrible - very squirrely and low speed. The boat would pull real hard to one side or another - no a pleasant drive. This afternoon on the way in I kept the engine trim at -5but used the trim tabs to tilt the bow almonst all the way up. It was not squirrely and speed went way up (19-22 knots at 3200 rpm). Any suggestions on optimal tilt?