This is the main x0xb0x PCB, you will also need to get the i/o PCB to make a full set. This is a vanilla x0xb0x PCB and is compatible with all standard builds and the new round button panels. Note:The x0xb0x uses some hard to find dual pots ( I have them available in the store ) It also goes without saying that some of the transistors and IC's used in this project are not in production and some are quite rare.