Just wore off some skin with my new Lab Rat from Sushi Box. I'm a big fan of Nate's secretive pedals, he makes about 40 devices per month but they are worth the wait, this is my 4th Sushi Box and this is going straight to my board without passing GO! Imagine the Rat you grew up with, but way louder, dirtier breakup AND tube drive thickness... This is a tube rat. It obliterates any other rat pedal on the market. The drive goes into the tube without the boost on. 12AX7 is a dual triode, so it has two stages; Lab Rat uses one of the stages as an output stage on the drive, and the other stage as a clean boost after the drive, so with the boost and drive both on you're cascading one overdriven tube stage into a clean tube stage. This also has silicon and LED diodes that are accessible by a switch. So far the SI diode is my preference, it sounds a little fuller to me. This thing is straight up amazing. Holy cow, I'm out of breath. The Boost is totally unnecessary, It's way over the top of my clean channel volume as it is. I'm in love with a Rat. The only down side I can see is all your Rats are now rendered second rate, sorry about that. Go get one!