Right.
In Cathar's design, the fins are 1mm thick, but they are cut square at the top, in such a way that it forces the water to spread out, as in comes in through the inlet. In my block, it's a thermal nightmare.
In your block, like I said, your fins are already pretty thin, so this is probably a non-issue. If you really want to do something about it, you could sand those fins to a sharp edge.
Nice going. Can't wait to see results!
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