Thanks Arthways, I did screw up the presale.  Semi 'new' window arrangement, I think.  It's not like Muse is one of my faves, so not too stressed, just dismayed at my own ticket fail.  Will see what happens today.
Should I assume that most if not all GA was sold during fan club and 9:30 presales?  Just don't know whether to start with GA, or just look for seats.