Those look super cool actually.
Regarding designing and printing, I think there's a gap between:
0. printing things based on found files that are free online, designing commonly produced things, and things people directly invent
And
100. Openly searching for unique things people are selling online and looking to get clones created and disturbed (hopefully free, but maybe for profit too?)
There's somewhere between those a fine line, and copyright law is certainly gray, but I feel there is a line somewhere in there that's not ideal to cross. I say this as someone who offers up all his files free online. It takes a shocking amount of work to design things that work right, and it'd make me super sad of I designed something, people were interested enough to buy it so I created a site to go with it, and then a reef club became a source for clones of it.
That's kind of what happened with random flow generators. The originals were published free, then some people started taking the files and selling them, removing the watermarks, maybe slight tweaks, and now that original maker gave up on distributing things anymore.
I don't mean this passive aggressive at either of you, and everyone's got different lines in there, but as an open source maker I feel it needs to be discussed.