Flexo springs are a good idea.
I was thinking of going with a bolt and washer, crimped down on the hose with a hose clamp. Looking into options to have the hose retract, like a vacuum cleaner cord. Right now I have some neat UniCo Clacker guns, but the pre-assembled conduit that came with the guns is just a bit too short for modern light guns - leads to inaccuracy because im too close to the screen.