i think i solved the problem with the heat exchanger for me.
i have a maze 3 i arent using, so i guess i can use it. could i just put it in the tank of the cold water or would i have to do something else ?
but i see another problem there ...
how would anyone get that many pingpong balls ?
i dont exactly know how much they are, but i dont think its cheap to get about 100 of them...
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