hi all iv been useing my coopers home brew kit for several batches all been good but now made the leap 2 ag gonna pop my cherry in the morning but have a small querry or 2 first my fv from my coopers kit seems a well made kit but can i still use this the same way with ag as it has no air lock and the lid dosnt snap shut this just sit on its the newer design and the ag setup i have got came with a fv with a snap shut lid and an airlock