I am very happy with the Pingles on both the Ladies. What vacuum? Gravity won't ever fail.

I had a Pingle hi-flow on my first Interstate. They are pretty bullet-proof. I’d say that’s the way to go except that I really like the way honda set up the shut off on the OEM one. I was able to switch to reserve while riding when I had the pingle, but it took some getting used to and was not easy. I also did not like the fact that the stem was shorter. It decreased my reserve fuel to about 20 miles or less. That’s cutting it a little too close for my liking.
I figure the first OEM petcock, lasted 22 years. A new OEM will probably get me through the rest of my riding years.