Modifying the ROG "Mr. EQ"

[mordechai]

I read a great little article on AMZ about adding clipping diodes to tone stacks, and I thought it would be an interesting modification to add to the ROG Mr. EQ. 

Here's the schem for Mr. EQ:

http://www.runoffgroove.com/mreq.html

If I want to clips each band, wher would you suggest I insert the clipping diode section?

Also, if I wanted to make it positive ground, I would just invert the battery leads and invert the polarized input capacitor, correct?