I would suggest playing with the air bleeds. I had so many problems with the 1050 Dominator on my previous boat I sent it to Nickerson 3 times to help get it right and it still was never quite there. The only place you really need to be concerned about being lean is the upper mid to top end, being naturally aspirated you can't really hurt anything below that. What exactly do the plugs look like? are they a light brown or ??.