I want to get a little more fuel on the bike for emergencies. I purchased some tubes from Tractor Supply, I believe it was. I had to modify the tab on the tube to fit the left pannier. I drilled 5/16 holes and used bolts with thin nylock nuts. I also used washers between all three plastic surfaces.
I'm contemplating putting one on the right side, with some of silver exhaust barrier on the tube, or, underneath the top box on the right side.