I hate to be a naysayer, but it appears the Daddy-O is built with "surface mount technology" (SMT) construction. They're much more difficult to modify, I've heard of people doing it, but it's not something I would attempt personally. Sorry!
As an alternative, you could buy a kit for a Marshall Guv'nor clone
and modify the tone stack for your needs. The Daddy-O appears to be pretty much a clone of the Marshall Guv'nor pedal...
You could socket the caps and resistors in the tone stack to let you try out different values of caps and see how they affect tone.