Yamaha f150 trouble shooting

WE PUMP THE TANK DRY,
REMOVE FUEL SENDING UNIT
USE INSPECTION CAMERA TO GET VIDEO OF INSIDE OF TANK
FILL TANK 25% WITH E-85 ETHANOL, THEN DRIVE AROUND FOR 10-15 MINUTES.
PUMP TANK DRY AGAIN.
REPEAT UNTIL WHAT COMES OUT LOOKS LIKE WHAT WENT IN.
FLUSH FUEL LINES.
CLEAN FUEL SYSTEM ON MOTOR

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IF I RESPOND IN ALL CAPS, ITS NOT ON PURPOSE, AND I AM NOT YELLING

10-4. Thanks