Venus.40 for Pattern? (What plane?)
basically, they screwed up AFAIC.
The tank position is in line with the crank case on the engine. Now don't forget that this is an inverted motor, so basically it makes it very difficult to get the motor to run sweetly due to the high tank position wich creates siphoning & pressure head problems.
If I could find an 8 ounce tank that was shorter than 4 inches I'd jam it in.