Quantity   Component name
1 × 1mm acrylic cutout & matched spacer for To-220 Heatsinks laser cut req'd.
4 × TO 220 heatsink with flat back , anodized black. jameco # 158051
4 × Silicone electrical insulating pads 0.3mm thick for To-220 used between Trigger chip & h. sink
4 × 1.5", 6-32 plastic machine screws for 'clamping' h-sinks.
1 × 1/8" HSS drill bit drilling Oscope case.base
1 × 6-32 tap. threaded holes for plastic screws.