Electric Mistress, 9v or 18 v

[bent]

Hi everyone....
I'm looking forward to build a electric mistress flanger....but i hesitate on witch one to build.....

the 9 vdc from tonepad:
http://tonepad.com/getFile.asp?id=102

or

the 18vdc from GGG
http://www.generalguitargadgets.com/index.php?option=content&task=view&id=86&Itemid=114

I love Gilmour's sound, and i know that he have a deluxe electric mistress 18vdc modify by Pete Cornish...in witch way - i don't know...
So i would appreciate your opinion on witch one to build...IF YOU HAVE SOME SOUND SAMPLE IT WOULD BE REALLY APPRECIATE.....

Thank's to all of you....

Bent

[petemoore]

  MAX1044 can do the 18v...for you pretty easy.
  Just make sure you use 25v caps and you can try both I *guess...if everything else is the *same?
  9v / 18v operations?, first guess is that you'd have more headroom with greater supply voltage.

[bent]

thank's petemoore,
so 18v should sound better ?

[petemoore]

so 18v should sound better ?

  Let me know !
  Reasonable but only speculative on my part [guess].
  If it does matter, it would tend to matter with higher source input voltage swings...say like HB's, Boosters and Bass..
  But I don't have one to know that.