Quote Originally Posted by Squirrel 2
And if you must tweak on your own, you tilt the nose down to alleviate pressure on the soft-tissue, tilt it up to ease up on the sit bones. Please tread carefully here. Dead-level is considered neutral and a good place to start. If you start tilting, you will put pressure somewhere else, too much tilt down & your arms & shoulders might start hurting.
OK, I will somewhat agree with this but the tilt is specific to the saddle. Depending on the saddle, pointing your saddle nose down can cause you to slide forward on to your soft tissue as well as your arms. Tweaking is fine just do it in very, very small increments. Try to find a flat road to do your test rides because climbing and descending take you out of a neutual position and you'll be lifting off the seat a lot.

Did you get the bike fit at the shop by them placing it in a trainer or just sending you out for a ride after each tweak? Fit is really best done on a trainer, but final saddle position has to be done on the road by you. If you bought it recently, they'll probably swap saddles also.