Sherman Filterbank 2 Rack,Sherman Filterbank 2 Desktop Replacement Rackmount Kit,Sherman Filterbank 2 Rack Processor - Perfect Circuit,MATRIXSYNTH: Sherman 2x2 Filterbank - Analog Filter and Distortion Unit,I got a fair price on a Sherman Filterbank 2 Compact, but wanted to rack mount it. Sherman doesn't make ears, so I 3D printed these. : r/synthesizers