This would be helpful to have here, just built one from sabros layout but it's not working for me and i have been trobleshooting all night with no success.
There might also be an issue with his layout, i have no idea really.
http://www.sabrotone.com/wp-content/uploads/2012/12/BrassMaster.gifThere two schematics floating around, the one from geofx claims to be "correct" while whining about ggg's schematic being wrong.
http://www.geofex.com/FX_images/BrassBlaster2.pdfhttp://www.generalguitargadgets.com/projects/14-bass-effects/62-brass-master