I was doing this. and its seemed to work ok. Tuner> Env Filter> Mystery Brain >Fluid Drive, Tumnus, SFT in loop> Spring Reverb and Trem in Carr Rambler But wanting to try adding a fuzz and Rat, and utilizing the El Pescadoro Fuzz> Tuner> Env Filter> Rat> Fluid Drive> Tumnus> SFT> Mystery Brain-LOOP ??> El Pescadoro> Same amp Suggestions for MB loop? Are the Brain and Jr B preamps in the MB and El Pesc gonna work at the end of the chain after a drive pedal or 3? Thoughts and suggestions?