This is a very simple little circuit from Dead Astronaut, which has a little bit of Big Muff happening in the clipping section on Q2.  Maybe not enough to tag it as being in the Big Muff family, it’s certainly a second cousin.  

While it might be simple, the Dead Astronaut X Fuzz is a fierce little fuzz.  

Here’s the thread on DIY Stompboxes 

DEAD ASTRONAUT XFUZZ – POINT TO POINT LAYOUT