PEEK is very expensive (close in price to titanium) so being able to use it in a FDM process is a huge development, since CNC machining results in a lot of wasted material. It’s you have the capabilities it actually makes PEEK practical for projects that would previously be cost prohibitive.
You can read more about the amazing properties/abilities of PEEK here: Polyether ether ketone - Wikipedia
I was one of the very first makers in the states to get my hands on this stuff and have been experimenting for months. The challenges involved in printing PEEK dwarfs those of even polycarbonate but the results are truly amazing.
If you are interested in high detail PEEK, I’m dialed in and ready for your project.
Let me know if I can help.
https://www.3dhubs.com/miami/hubs/mindfull
-Jesse
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Sweet! You’ll love this @toymaker2 @derKarsten 
