mcinku, pickmaster, thanks. I'm not sure which 150K resistor to change.
It looks like one is right behind a 0.1uF cap, and the other is linked with a 220K resistor behind a 0.05uFcap. Thanks! 

Dr. Ika,
   Thanks for posting your mods. I still have a few questions.
   I have a new OTS with 100uf filter caps. What does making them 150uf do?
I have a 100K volume pot. What difference does the 250K pot do? I play
humbucking guitars, and love great clean tones. What's the best mod for best clean tones? Sure appreciate your help.

Beautiful clip,
    What speaker are you using? I'm still trying to figure out what speaker and cab to use with mine.

I'm not a tech, and trying to understand a few things. I just received my new Ceriatone Overtone Special, and looking at the layout, I saw the new ones come with the mods that Jack Zucker did on his amp. There are 2 exceptions. Mine comes with a 1K 5watt resistor on the power tube sockets as opposed to the 470K 5watt ones in the Zucker mod, and mine comes with 2 100uF 450V capacitors on the power supply board? (not sure if that's right) where Jack added a 50uF 350V to each one to make it
150uF (I think). My question is: Does anyone know what the additional Zucker mods do for the tone on this amp?

Thanks, you're right. When I worked with little potentiometers before,
the arrow side would increase as you turned it clockwise. This pot works the other way. It decreases when you turn it clockwise. So looking at the pot from the chassis end toward the transformer is the right way.

Just got my Overtone Special and am a little confused on the OT trim pot even after searching the forum. I assume the adjustment is made on the little arrow side of the pot. Looking at the pot from the back of the amp it is on the left side of the pot. Is this correct. One post I read said it's looking at the pot from the FET board toward the transformer, but I think it's the other way around. What's right.
Thanks