If you pop off the back of your El Grande - I'll tell you right away if it's a tonebender clone or not. TB clones MUST have only a pair of clipping diodes and only three transistor stages - in my experience with about a half a dozen different types of muff mods to tonebender specs and my own builds - I'd say - above all those two features are the "heart and soul" of the tonebender fuzz. In fact if you have a Big muff (not a little big muff) then you can get REALLY close to the tonebender sound by simply removing parts and adding a jumper (sure you could change some values of transistors, resistors, and capacitors) BUT if you want to get a quick and nasty idea of what a tonebender sounds like - you pull the last transistor stage (the one without clipping diodes and right before the volume pot, make sure you pull everything between the tonestack and the volume pot - about 6 components) and you pull the first pair of clipping diodes and the cap attached to them. then you jumper the end of the tonestack to the input side of the volume pot. that's it. if you want the cheapest tonebender around buy a new russian muff and do this mod. It'll work.