Hello all, I’ve been scouring the internet to no luck and I thought maybe the good folks at TDPRI may know... About nine years ago I bought a T-Rex Yellow Drive secondhand. I’ve absolutely loved it. It’s basically been on my board since. I’ve shot it out against many other drive pedals, but none have dethroned it yet. What I really want to know is, does anyone know what the circuit is based off of? Is the Yellow side a Klon and the red side a Rat or Tube Screamer?? It’s slightly driving me crazy. Basically everyone I’ve talked to who has used the pedal has nothing but good to say about it, but it seems shrouded in mystery. Thanks for your help, and cheers!