Hey there... Quick question for you. What is to prevent an individual with a Sustaining Foci to cast the spell into the foci and, if they don't like the results, merely deactivate and recast it for a better result? Just did a quick scan of SR3 and MitS and didn't see anything obvious...
If the spell changes then I'm perfectly fine with the idea of the focus needing to be re-bonded (i.e. the idea of magical cleansing). But if the spell is primed for a given spell, then...?
Many thanks for your patience and help with yet another simple question from me...
Kage