As long as the engine runs off of both tanks equally well, what's the problem? I used to run twin tanks with a fuel selector switch. When the one tank ran dry I knew it was time to switch over to the other tank and start thinking about heading home or at least to a fuel dock.. one tank out, one tank in. Worked fine for me and I never got stranded without fuel. 
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer
1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer
1996 V21 w/1993 200HP Mercury on a Shoreline Trailer
All towed by a 5.7L Hemi Durango.
If God didn't have a purpose for us we wouldn't be here, so
Live simply, Love generously, Care deeply, Speak kindly.
(Leave the rest to God) 
Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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