Success!
I might do take some more explaining pictures when I make the next one if others are thinking of something similar.
The tube to circular patch was the tricky part to figure out but eventually I found a easy method. The 8 pizza/flaps pieces are overlapped so that there is no gaps but I reinforced with seamgrip just to be sure.
The bottom is as simple as it gets, inside the tube there is a rectangular patch of double sided TPU. The cord is used to tie it to the bottom of the tube section where I have two loops attached to whats still accessible of the floor. A change to original plan is to have two attach points that is apart from each other, this makes it more adjustable and stable.
The tubing is 40 mm PUSH-fit pipe used for bathroom sinks etc. 5€ for a meter.
Overall a very light weight solution. Not yet tried it as I’m waiting for the waters to clear from ice but it feels very secure.
