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Look for the lightest gauge electric guitar strings, Extra Slinky.Crimea and Airframes:
Thank you guys. I'll try both. If Airframes can provide the link or website address to Model Design and Construction, I'd like to contact them and see what they have to offer. I'm at this stage where I'll be fabricating the hose pretty soon. I can well imagine what Crimea has to say about the guitar strings being "... a bitch" to bend." They're not designed for bending that's for sure. Still, if they can be crimped and twisted around the neck of the guitar's tightening adjusters, then they might (perhaps, possibly, conceivably) be able to be bent and glued into place. I've got my wife asking one of her friends who plays guitars if he can spare one of his old strings that might've busted. I'm looking at the high-frequency end strings, not the low bass as seen on those acoustic guitars, they most likely be smaller in diameter and more flexible. What you say?
If all else fails, I'll wrap some thin wire around a rod and create a "spring" from which I can wrap some tissue to form a hose.