When I start to play with the tabs, the wants to heel over to starboard. It does this even if I'm putting both tabs down at the same time.

Checked and added fluid, still does it. The mechanical indicators at rest show both tabs going up and down and you can hear both motors working. Both motors sound very similar putting the tabs up and down.

I ran with the tabs full up all weekend after trying and retrying multiple times. Even with three different drivers, same thing, so its not just me.

Thoughts? Boat is a Sonic 31SS, 496MAG HOs.

Do they need to be bled??

Not sure, I'll give it a shot if there's a procedure for doing it in the slip..

if the indicators are moving, then the tabs are moving. no need to bleed. just put the one tab down a couple notches further than the other.....it should level out.

Every boat even same year make and model have a tendancy to react as well as balance differntly. Maybe check your drives from one to the other also, position vs gauges. On the boat I'm finishing now I went with all mechanical gauges even though I tend to ride by feel rather than what they say.