I had a permanently mounted Jerry can in my D90 and used a "jiggler" (super-syphon) to transfer gas to the main tank. And I used it too many times to remember, as I was forever forgetting to fill my main tank and would run out of gas often. I simply used the Jiggler to transfer the gas in a couple of minutes and was back on the roadWhy don't you use a jiggler siphon instead of nozzles? I keep mine in a plastic bag ready for use, no spillage no lifting and holding the can and I usually fill from the roof rack straight into the vehicle filler.