Put the thing back on, works perfectly...it did take about a half gallon to get the reserve flowing, so I can see why they modified it some on later 400's, to drain a bit more out probably...also, I tightened the collar (left handed thread) on the tap before srcrewing it onto the tank (right handed thread) and it did not line up correctly, abit loose...I managed to use hold the big nut with the 24mm and use some channel locks to move the tap while snugging it up...so far no leaks. I recommend lightly hand tightening the tap assy then getting it nice and tight on the tank in both directions as you would like it to align.