Yup, except it's not my first time, which makes it sad - I've had an aircooled 911 for almost 20y. But the 72 tank did catch me for sure, I don't see a good solution other than removing the wheel, a scissor lift or a thinner pan that still takes, what, 8 gallons so in 3 seconds ? ;-)
On the positive side I sucked out the right amount, the tank level is perfect when warm at idle....