I did not remove the Predator tank when I installed it in the Nova, instead I teed the two tanks together. Now I can fill both tanks thru the original Bonham fill spout and not have to remove the seat to get at the Predator fill spout. The spouts of both tanks are the same level, so they fill evenly. Once filled, I shut off the Bonham tank and use the Predator tank to run on. When Predator tank runs dry I open up the Bonham tank and use it as a reserve. Has any one used this setup before? I came up with this because my Honda Trail 90 has a reserve, and I use it all the time.