Looks like you are using a 5 gallon carboy for your primary fermenter. A blow off tube will be mandatory for any batch of beer you brew. If you dont know what a blow off tube is, its just a clear tube going to a bucket of water so the foam has a place to go. Just keep the end of the tube...
Im looking for the rubber ring that the "ball" on a miller keg rests against. The main o-ring that you see on the top of the keg. I damaged mine getting to the safety lever, so I can refill the keg. Looked for a while online with no luck on finding replacement parts....