"Michael A. Terrell" fired this volley in
m:

Thin, half inch heat shrink or similar plastic tubing will keep it
from snagging. A small spring can hold up the center. There are
plenty
of ways to do it.

You'd have to see the design, which I cannot show you. The spring is nix
for problems of mounting and movement, and PVC in any form is not
permitted.

Believe me when I say we explored that possibility at length.

LLoyd