sewing perfectly is not related to blocking the quilt...the sandwich itself can lead to some 'wracking'...and the simple technique of washing, staking out on sheet covered carpet, and allowing to dry is easy as pie to do...so why not have it nice and flat? I don't even think it has to be going into competition...i make my quilts for my home and my enjoyment... they look better.. and i ALWAYS block my wallhangings so they hang flat against the wall... and I do spritz with my water bottle, but really only because my washer spins so dry that it doesn't really have quite enough dampness to take out any stubborn wrinkles ... leave to dry and enjoy...