Alright, I can do 1/16 of an inch. Yeah, there is the jet down the middle, going into all of the channels.
I'll keep to 2.6x1.4 then, since I'll plan for a bit of leeway in the design, and it's only 17 thou at the most.
If I have 1/16 for the bottom, how much room should I leave for the water (Height of the channels)? I'd guess around 3 times as much.. so 3/16 or so... But that might be too restrictive.
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