Here's why I quit using them. One time I was filling up my plane with fuel and somebody walked up to talk to me. I pulled out the fueling probe and talked with my buddy. When I turned back I noticed a HUGE puddle on the ground. The fuel valve stuck open when I pulled the probe out and allowed everything in my tank to siphon back out on the ground. And it was a 24 oz tank!!!! [:@]

I went home that day and pulled them off of my plane and tossed them in the trash for good.

Ken