====== Hole sizes ======
Footswitch: 11.7mm (12mm) \\
Potmeter: 6.7mm (7mm) \\
Led fresnel: 6.3mm (1/4") \\
Jack (Lumberg): 8.9mm (9mm) \\
Jack (Switchcraft): 9.3mm (3/8") \\
DC input: 11.6mm (12mm)