Do you have any experiences with some products from the company Wildfellner from Austria?
They make shaftless spiral conveyors and some friends told me that they are very good.
I want to use the conveyor for transporting wood pellets, but I have read on their homepage (www.wildfellner.at/en) that you can use the conveyors for many other things.

Info: www.wildfellner.at/en