Quote:
Originally posted by _Mike_
Well, if you look very closely on the back wall, or the back of the inside channel, you can see faint horizontal "ribs". At least, that's what I see.
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I think that's a shadow... It couldn't be ribbed horizontally, well, I guess it could, but that's be hell to CNC.
I'd like to see it compared to the TC-4. The TC-4 has turbulators, which should improve performance, but this new spiral has a "higher flow is better" approach, which I like too.