Thanks for the info Tia , I know nothing about milking machines , I used to milk mine by hand only.
The one he has that is milking right now is a very good milker , but the next one I'm not so sure of , so We'll see what happens.
Good to know about the vacuum , I will get a vacuum guage for it right away and install in line somewhere.
He did say in the video to turn off the vacuum pump once milk flow starts and turn it on again when milk flow starts to slow , I will make sure they learn to be gentle with it.
Cheers , Jim.