when I first set my 74 up w/two 40 gal tanks, I tried and tried to make it work...never did, so I put individual shut-offs on each line and controlled them manually...run off one tank goin out, the other comin' back...
I got a buddy w/aSkeeter bass boat...has twin tanks and draws them down evenly from a single line...how it does it, I ain't figured out yet...
