To late but maybe it will help others. I had the same problem but after loose the tank a bit i was able to push it to the middle about half inch. Than i fix it again. This works perfect since 10000mls rough roads in Africa
2001 SMB E350 4x4 7.3 Powerstroke
1968 Pontiac Firebird 400 Convertible ,1978 Peugeot 504 Convertible,1988 Porsche 911 Carrera 3.2,KTM 300 EXC,BMW G/S Paris Dakar,BMW "Diabolo"