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Great work. I made a heatsink for a Nikon D70 years ago. Unfortunately I damaged something in the process and it was a failed project.
That copper looks quite thick. Is it about 2mm thick? You could even use thinner copper like .7mm and cut it with snips. Or 1.2mm. You can get that from Austral Bronze or hobby stores often have small sections of copper sheet.
I presume the vast bulk of heatsinks around are aluminium because of cost or is it also very efficient? I would have thought a copper one would leave aluminium for dead.
Greg.
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