Originally Posted by
Recycled Flyer
...And dropping the tank below the spray bar is fine as long as your model never goes inverted!
That advice was pertaining to the test stand he is using (shown above). On my CL airplanes I usually center (plus shims) the pickup as needed to achieve the same setting whether upright or inverted.
My planes are mostly sport or stunt so I tend to use either an 8x6 or 9x4.
George