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Choose your modifications from the drop-down menus to be installed in your pedal.
Creamy Dreamer - While it's well documented that Billy Corgan of Smashing Pumpkins used a Op-Amp Big Muff, for years people wondered what BMP he used. This mod was what was thought to be it. While it isn't an Op-Amp BMP, it does get close and is a good mod in it's own right. If you want an Op-Amp Big Muff like Billy used but in a much smaller package, check out the Griffin Effects Cherub pedal.
DC Jack - You now have a choice. Battery or DC jack. Add a DC jack to your black Russian BMP so you don't HAVE to use batteries anymore.
True Bypass - True bypass your pedal. Includes a LED.
Silent Step - Get the Griffin Effects Silent Step soft touch true bypass switching installed.
To send your pedal in for modification, print and fill out this Modification Form and send it in along with your pedal. All the information you need will be on the form.
Limited 5 year warranty