We are just setting up our milker with new inflations and shells, and vacuum gauge. It belongs to my daughter and son-in-law, but I'll probably be the main user. From what SIL could tell, the vacuum gauge should read between 20-24 in / Hg. Is that correct? For now we will only be milking one goat at a time. My other question regards cleaning the inflations and shells. Should they be separated for cleaning or not? I've seen it mentioned both ways. The instruction manual from Hamby says (on page 8.): "With the patented Surge Shell the inflation never goes back in exactly the same way, and you prolong the life of the inflation by removing it from the shell. This is the ONLY way to make sure the inflation is properly cleaned." http://www.surgemilker.com/instructions/surgebucketmilker2013.pdf Any thoughts on this would be appreciated.