Well as much as I might like having 5.8 gallons - the GS850 tank is just too big for a Savage.
It seems that for my upcoming "standard" style project, the GT380/550 tank is likely as big as I can get and keep the tank a size that looks good. The GT380/550 tank has about 3 gallons to reserve, and it gets me 160 miles of range on the Cafe' bike until I hit reserve.
If you want to buy the GS850 tank.....let me know!