Funtana140, I left that nosering off... I made that carbon-balsa sandwich firewall in the middle of contest season and was in little hurry to get practicing again... Worked fin without nosering so I haven't bothered to install it...

But my friend has same kind of nose ring on his Funtana 140 for FZ140L. It has flown about 200 flights and I think he has changed the tubing only once...