Cost is directly proportional to the amount of hoops you are going to make me jump through
[I'm joking]
..... if it's a design I already made. then I'm cheaper than almost anyone else out there...(doesn't sound good, I know
) but when it comes to custom requests, I'm sure you will agree that cost can not stay as low as with a production model.
I however pride myself in being one of only a handful that actually has the ability to produce a waterblock on the fly, with information and design schematics, sent to me via email...... NASA can't, or won't even do that....
Jim's, you might have a good point there.... using the turbulence factor as an sales pitch might be a good idea, only problem, almost everyone in the world seem to think flow-rate is what makes a block work.... very much similar to the predicament AMD has with regards to CPU speed. GHZ is not what makes a PC fast, it's what you do with that cycle, that will make it fast. Same goes for flow-rate/turbulence .