Hi,

I think, the solution is to use both possibilities of rigidity of flowing.
The sin of your hose could be flowed with a "none rigid flow" (it will be compressed and stretched) and the rings could be flowed with the rigid option (no compression or stretching) to keep their original aspect.
I test it with a boolean unioned sin to have a single solid without hole .
It works !

A problem could appear if you have a too big curvature in path because rings could can clump together because the physical constraints are not possible to be applied.