Tracers wipe Stealth device; yea or nea?

Only if they hit the target.

Only if they hit the target.

That should probably go without saying, but yes. Stealth Device says nothing about suffering damage, it cares if an attack hit, which is defined as there being uncancelled hits or crits after applying evades in the Compare Results step. That Tracers don't do damage is irrelevant; if they hit, they simply cancel all dice and pass out target locks. They still hit, satisfying the condition to remove Stealth Device.

Lt. Blount can "hit" a ship with a Stealth Device with nothing but blanks and it removes the Stealth Device.

A ship with a Tractor Beam will be able to "hit" a ship with a Stealth Device and do stuff to it excluding damage and remove the Stealth Device.

Those Tracers are just like those in that it is only required to hit the target and that is all it takes to remove a Stealth Device.

I would add that if Wampa were to use his pilot ability against a ship with a Stealth Device the SD WILL remain as the attack will actually miss the target, no uncancelled Attack dice will get through Defense, despite his ability actually dealing a card to the target. Hitting a target does not always mean damaging a target and conversely there are many ways to damage a target without actually hitting it with an attack.

What I thought. Appreciate the quick turn around.