I for one would love the idea of having a few extra gallons of gas just in case. I put 106,000+ miles on my '07' Ultra before trading it in for my '14' Tri-Glide so we do a great deal of riding. No way could I give up my trike for months while a tank is made, but I'd buy one once their available. That and I could keep up with my two wheel buddies and their 6 gallon tanks since they're getting 40 to 45mpg instead of my 30mpg.