Sample roasters, accessories, spare parts, and more › PCB Motherboard Image 1 of 1 PCB Motherboard €350.00 The brain of the ROEST sample roaster. Changing the PCB is easier than you might think! Here is the guide for replacing this part. Add To Cart Added! The brain of the ROEST sample roaster. Changing the PCB is easier than you might think! Here is the guide for replacing this part. You Might Also Like Quick View Chaff Drawer €45.00 Quick View Solid State Relay, 25A €40.00 Quick View Hopper for 200g €110.00 Quick View Easy-access charge handle kit €60.00 Quick View Ventilation hose, Ø80mm from €20.00