Maybe that channels made with thin dremel discs are too narrow...Considering the wavy shape of the 'walls', maybe I should open the channels more with say 2 mm mill bit, there'll be still much turbulence in the channels, and the block will have less restriction... Think I'll try this one of these days when I take out this block. I don't wanna make another one with questionable results, better massacre some more this one...
Snow is still waiting...giving me some more time...
What's happening on your side? That plexy top block?