So, I may have someone who can fab me up a little external fuel tank for the right-rear of my Xchallange. I want to feed it with the fuel vent line from the main tank. Question is: Where/how do I need to route the fuel pick up line?? From top, then a tube to the bottem of the new tank?? Also, is there a place whre I can purchase online a filler neck and cap?? Aluminum??