Wands and Wotcher

[Woodward, Deirdre]

No: HPFGUIDX 82830

I was just reading PS/SS (Brit edition, paperback) last night and noticed that Hermione grabs Harry's wand to perform the Alohomora spell that unlocks the door that leads them to Fluffy -- pg 116 or 118 of the paperback edition.
 
Apparently wands are multiuser objects.  I would imagine that the better the fit, the better the spell, however.  
 
And what does Wotcher mean?  Tonks says that a couple of times -- "Wotcher, Harry!"  Is it some kind of greeting?
 
Thanks,
 
Deirdre
 
 
 


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