I've done three FW kits, also in a 7.5G fermenter, all with double skin packs. As OldCorker indicated, it was just enough space until everything settled down.
In two of the kits I then transferred to a 7G Fermonster for EM and then to a carboy for bulk aging.
I think it's a great idea to get a 20G Brute as Bryan says, and have peace of mind, plus some expansion capabilities.
In two of the kits I then transferred to a 7G Fermonster for EM and then to a carboy for bulk aging.
I think it's a great idea to get a 20G Brute as Bryan says, and have peace of mind, plus some expansion capabilities.