Do you have a link to the tubes? I have tried to find it at Swedol but without success. Me and a friend are sourcing all the parts and have found tubes but they are only 1.5mm thick, I don’t know if that’s going to a problem or not. We assembled one of the rollers and it was really exiting. We found out that the pipe diameter was between 24.95mm and 25.05mm and that actually made a difference in how “tight” the bearings were with the tube.
Here’s the link to the tubes if anyone is interested https://www.byggmax.se/forvaring/garage-och-verkstad/ror-och-rorsystem/ror-2200-habo-krom-p7270147