WTF JRC386

[9Lives]

Just breadboarded the 386 based Big daddy from ROG. And I was blown away at how much these 5 or 6 components worked. I toned it down a lil with the volume and put my od808 infront of it and I was chugga chuggin' like crazy. This is pretty bad ass. What  had me scratching my head was that the delay after it totally muffled the sound. Not good. What's up w this? And being that it's such a simple design there must be a way to design a more complex circuit out of this. Has it been done?

[9Lives]

has anyone tried adding gain stages to this and a tone stack?