Section 8 of the factory assembly manual Shows a short section of hose at the bottom of te tank.
True. And I bought that hose thinking I would be able to use it. However, the connection on it is a 3/8ths inch and the new tank is 10mm. Oh so close! But if I learned anything from my airframe brethren in the Corps, it's that if it doesn't go past hand tight to begin with, it probably isn't going to go at all. And if it does, get the tap set out. You're going to need it!