Ok fyi my long overdue project ( i now have 98% of my parts collected) is a spare AUX 3gal gas tank. Problem is however in the mounting Ive opted to use a rear sports rack it fits my yr bike & can allow alternate options for future use. Ive found 1 pic on google where someone else did what i have planned. image.jpg No other information available. A previous member sold me his tank but he had a custom built rack to mount image.jpg & litteraly drilled hole in gas cap for a gravity feed hose. My plan is a cleaner tap into the tank itself & a proper pump. Back to the problem: the footprint of brackets is right on inner seam of the rack image.jpg (inside of rack lid & 1 tank bracket) my plan was/is to get bolt pattern like this:image.jpg so will be reinforced & all on inside. Suggestions or info on the bike in first pic please & thanks in advance