Hey ladies and gents
There is an bio friendly flexible printing material on kickstarter. What’s everybody thought about it? Pretty neat 
So far it seems like we only have flexible resin materials with SLA and DLP printers, would be awesome if this works well!
https://www.kickstarter.com/projects/bioinspiration/flexible-compostable-resilient-3d-printer-filament/description
The problem with flexible material is that you need to have the stepper directly on top of the hotend -> should work in the ZIM therefore!
BUT: I consider the teeth of the ZIM as far too flat to be able to transport a flexible filament through the nozzle: at “standard” printers you are able to control the pressure which is applied onto the filament and also there are better gear teeth which grab the material better.
Next to my ZIM I do have this xBot printer which is shown on their Kickstarter campaign: it has incredibly sharp teeth and therefore there is absolutely no dobt that this printer can grab the filament correctly (but it’s a bowden printer…)
I may be wrong but I do not think that flexible materials will print well! 
There are many interesting materials available and constantly new ones are released.
I find PLA HT the most interesting. But these special filaments are said to be much more problematic to print with than ABS.
So I did not dare so far.
I have NinjaFlex and another Flexible Filament from another brand here. I have not tested it so far, because I had no project yet and don’t want to open the vaccum container.
More special filaments are great I think. But it depends on the price and especially on the printing properties. If its difficult its useless.
Wow, its expensive. I feared that.
And its from Berlin, Germany. I like it already 