Re: fuel gauge for bike
My 4-liter Happy Tank has a locking gas cap. This puts me at ease when I park it out of sight. The fuel system also vents thru the cap's keyhole. I'd love to install that cap in the post above mine, but paranoia won't allow me.
Besides, my rides are short, I've got a large tank, good memory and an 18oz reserve bottle. I admire y'all's creativity, tho.