I once built an ODR-1 clone from a PedalPCB project; however, it was far, far too bassy. I replaced the 1k5 resistor with a 22k and it cleared up very nicely. I gave it away, but if I were to build another, I would actually add a 50k pot in that location and replace the 2.2uf cap with a .22uf cap. I think the Aion FX Andromeda does something similar since it also has a bass control built right in. It's a great sounding circuit once you tame the low end.