It still seems like a lot of trouble when a dual 500 CPU is like $20 now and a whole QS machine can be had for $50 plus shipping.
http://www.ebay.com/itm/PowerMac-G4-M8493-733MHz-640MB-RAM-NO-HDD-/231378851401?pt=Apple_Desktops&hash=item35df411649
$39.00 + $10 shipping, bring your own hard drive.
Oh, and you do know the 733 Quicksilver CPU has no level 3 cache, right? A 733 Digital Audio CPU is faster because it has the cache.