Bluefendermanblues,

Thanks for the tip.  I soldered test clips to my master volume pot and tried a bunch of different cap values that were suggested by Dogears on the Amp Garage forum and wound up selecting the 47pf just as you said.  It really opens up the tone and makes my humbuckers sound much better.  I also noticed that it seems to smooth the overdrive sound as well.  Not sure how that works, but it sounds smoother to me.  Clean channel it also more open sounding (a bit brighter with better definition).  I highly recommend this mod to all Overtone users.  As previously mentioned, just solder the cap across the 2 legs that aren't going to  ground.  Lower values will give less brightness.  Dialing in your own preferred sound in is easy if you do the test clip thing and try a range of values. I tried from 33pf to 47 pf as per S. Lerner's advice.  If you are less ambitious, just go with the 47 and see if that works for you.

I wound up with the Dimarzio EJ pickup.  It's brighter and more focused than the Seth Lover.  My objective is a setup that will work with both single coil and humbucker guitars. My single coil sounds are so good, I preferr not to mess with the amp anymore.  The EJ works pretty well.  Not perfect, but I'm still tweeking settings.  I think it will be fine once I'm done tweeking.

Thanks Hywelg.  I believe the Seth Lovers that I have are vintage spec. I'll try the treble bleed in that guitar and a P90 in the other one. I'm traveling now so it will wait till next week.  I'll post results when I'm done.

Thanks again Mitch.  I was actually wondering about the EJ dimarzios.  I also thought about the treble bleed cap, but the SLs are sufficiently far away from the sound I'm looking for that I think surgery is needed.  I have some P90s in my junk bin so I'll try them first in my faded Gibson LP DC.  My main guitar is a  Hamer custom Artist and that has the SLs.  If the P90s work in the LP I might try Seymour's Humbucker sized P90s.  Any suggestions on amp changes very welcome.

Thanks Mitch. Jack's P90 clip sure sounded good, so I'll try them in my LP double cut as you suggest.  I've got the 12 65s and EVs.  The Humbuckers just seem to lack the definition and do sound a bit dark/muddy in comparison to the single coils. I have single coil EMGs in one guitar that really gets close to Larry Carltons tone.  I have to believe that something will make the Humbuckers work, just not sure what. Scott Lerner's sound great in his SLX amps.  I wonder if there's another mod needed?

Mods finally done on mine. Massive improvement in the clean setting.  Blackface Fenderish.  Overdrive is also improved, but I'm getting much better sound from a bridge single coil than a variety of humbuckers.  My Seth Lover PAF doesn't sound very good at all.  It's in a Gibson scale length neck.  Suggestions?

Jack,

what resistance is your Overdrive trimmer set to?  I love your P90 clip!

Nevermind. Works fine on my computer at home. Must be something wierd with my work PC.

Thanks again!

thanks Jack, Ayan and Scott!  For some reason, the diagram is truncated when I open it.

Jack,

That sounds awesome! Would you please write a summary of your mods? I read that you were waiting for some stuff from Mouser and don't know where you finally landed with all of the mods. Your help is much appreciated!!

I'm using 2 separate poplar cabs with a 12-65 and an EV.  Together they sound awesome.  Separate they sound good.  The EV is an old Boogie 200 watt Black Shadow.  Not sure if it's the same as new EVs.