Yes I do think Paul's tank was too high.  My sump is standard Velocity 173 (5-gal, mounted ON the fuselage bottom just forward of the MLG bow.  The fuel level in my sump is just a few in below the bottom of the strake, but the bottom of the tank is over a foot lower.  I really think my [assymmetric transfer] problems could be solved by using 1/2" lines from the strake to the sump v. 3/8".  I like sumps when they work - they give you usable fuel out of all that wasted space in the belly of the airplane - but mine doesn't. 
Guess I'll just have to put in those big lines ... Jim S.

Perry Mick wrote:

Jim,
Thanks for that explanation. Did you see the photo of Paul's sump tank? Don't you think it was mounted too high? I bet yours is lower.

Jim S. wrote:

I don't have a Rutan type selector valve.  I have strakes gravity feeding the 5-gal sump through lines about a foot long.  Assymmetric transfer was such a problem that I installed electric
valves to DE-select (close off flow from) the tank that was transferring too much and let the other catch up.