DIY Copper Heatsink (No lathe, no power tools)

[Jerommel]

Yes, those copper shims are very handy.

You can also buy copper rods from metal shops or ebay in 20mm size and just cut it to the right height.

The problem with a rod and a saw is that it’s hard to cut it straight.
With stacking shims you can be quite certain that it’s straight (enough).