My level 5 alchemist got a Headband of Aerial Agility +2. The description of the item says:
The wearer of a headband of aerial agility +2 treats his caster level as if it were one level higher when casting spells or creating extracts that grant flight.
Furthermore he has added the Fly spell into his formula book by learning from a Fly scroll.
Is it correct, that he can now create a Fly extract with the help of the headband and really fly around although he would not be able to create level 3 extracts?