Here is a video demonstration and review of an experimental flexible filament made by Fenner Drives NinjaTek division called Cheetah. I was selected for Beta Testing and am now allowed to release any content I have made during testing since they just announced the product at CES. Check it out!
https://www.youtube.com/attribution_link?a=Fea8uI1a34M&u=%2Fwatch%3Fv%3D4gQg3CXZLnA%26feature%3Dshare