Do a reset on you trim tabs by bringing then all the way up and then adjust a little as necessary. They are for balancing the boat side to side only to correct for slight side to side lean from weight distribution or to be used in a tight turn temporarily to flatten the boat out some in the turn. Add a small amount of trim as you go into the turn and remove it as you come out of the turn. I count the number of taps on the rocker switch so I know how much trim went on and how much to take off. Trim tabs are not really for adjusting bow up bow down situations as that is the job of the trim on the leg/s/motor. If you get the trim tabs way out of balance something really nasty can happen. The boat can develop a condition called bow steering which is a nightmare and I learned about it the hard way. As you start off on the main and slowly increase speed the bow will quickly dive down, turn and dig in to one side and the more power you apply the more it will dig in and force a turn. In a bad case the effect can be startling with things flying around the boat and a sense of complete lack of control. To fix it bring both tabs all the way up then if you have any side to side lean adjust a little to compensate,, a little at a time using the tap method. This may not be you problem but a bad case of this will cause a forced turn and steering will not help and will get worse the faster you try to go. It can seem like your bow is trying to dive underwater to the side forcing a tight turn. I think this happens when you use the tabs to off set each other and get them both two far down and out of balance. In most cases you just want to adjust the one tab a little. If your tabs ar very large for the boat this is more likely to happen if you get them badly trimmed. I just noticed you don't have tabs on the boat yet but if you get them this is good info so I will leave it.
