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That's a good observation! I had such big heat sinks on their previously they never even got warm, so when I made the modifications I didn't consider heat as much as I should have. Now they are the size they are, they do indeed get quite warm so I limit my run time so the plastic doesn't melt, but I still do get some good time from it before it gets that hot. I may change them out for some larger ones at some point in the future which shouldn't be too hard.
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7.2 kW Tesla Coil
