Here are the files for those with cnc, access to a cnc or workshop
https://www.pcbway.com/project/shareproject/First_Class_Amplifier_chassis_99b8c1f5.html
- 1.5mm base plate galvanized steel gauge 16
- 4mm aluminum 6061/6063 front face anodized silver/black cnc
- heatsink aluminum 6061/6063 anodized black mold or cnc
- 1.2mm mild steel gauge 18 powder coated black all other parts
- 19inch chassis 400mm depth, 117mm height
- M4 screws self tapping top cover
- M3 screws non self tapping all round
- adjustable base plate , 10mm standoffs for transformer bolt
https://www.pcbway.com/project/shareproject/First_Class_Amplifier_chassis_99b8c1f5.html