Another Grounding Question

[Logical Frank]

OK--so I have this old Peavey Strat-o-thingy that I just redid. It works and sounds great but there's a little buzz. I went through it yesterday and double checked everything and all my connections (including the ground to the tremelo claw) are good. Anyway, there's a bit of buzz that's just loud enough to be annoying that I'm trying to get rid of (probably wouldn't care if I hadn't wired this myself). It's distincly different than the buzz from the single coils and goes away completely when I touch the strings (so that means the bridge ground is set up, right?). Is there anything else to check and what can I do that might help?

I used this wiring diagram: http://static.zoovy.com/img/guitarelectron.../wdu_hss5l11_01

[mammoth guitars]

Properly grounded guitars on a high gain amp will usually cause hum when you are not touching the strings.

[Logical Frank]

The amp in question here is a Fender Champ, about as high-gain as a tree stump. I don't think it's anything other in my setup other than my guitar because other guitars in the same setup don't hum.