Look at it as an investment. If you don't have that floor jack directly under the center of mass (or if there's some gas in there that shifts and changes the center of mass of the tank) then you'll probably do $100 in damage to the lines if/when it tilts/falls. The wider base of the ATV jack prevents that from happening *wink wink*

Split it with your buddy... $50/each, not bad at all...