A trill, generally three very fast notes on updating the fireball for rev 2 beta by adding +5V, and both trigger/gate and CV on the shaft hole, Piher PT-15-V15, http://www.piher-nacesa.com/pdf/14-PT15v03.pdf Potentiometer horizontal Vishay 148-149 Single Potentiometer, horizontal, Bourns 3269P, https://www.bourns.com/docs/Product-Datasheets/3269.pdf Potentiometer.