All aftermarket tanks I’ve seen have had the metal pot inside, I’m 99% sure the ones GG are selling are just regular pattern part tanks, I bought mine from a local panel supplier for £72.
i emailed GG and asked if their tanks where just the same as the regular pattern part tanks and they says probably lol.
You should only get fuel starvation when turning left anyway but to be on the safe side I bought a swirl pot.