ORIGINAL: AA5BY
Another option is to wrap the brass fuel stems with a copper wire near the end and then solder to create a ridge. Then use small wire ties on the fuel tubing to lock in place.
This is exactly what I did. On my maiden I had prop strike (which I was unaware that it took 1/2 my prop dia away) which vibrated my line inside the tank off and ended up deasticking into the swamp. The copper wire tip works great....over 100 flights without a mishap since.
Kevin