Wow, any other exotic brands and designs out there ?
Actually I am bringing this up because I just ordered some engineering thermoplastics for making some custom made blocks. Not proud at all to copy someone's else design but the Karver blocks are just simply impressive. They are expensive because of the use of PEEK thermoplastic. PEEK is 20 times more expensive than Polyacetal or Polyamide, and about 10x more expensive than Teflon (PTFE).
I'll let you know guys how will the home made blocks perform. In about 3 weeks from now.

And "form follows function" dates waaaay back, and the smart person was Vitruvius, quoted and interpreted by many. American architect Frank Lloyd Wright further developed this concept into "form and function should be one".

So, any other exotic makes out there ?