Just spotted the time difference, you chaps will be tucked up in bed.
I tried a couple of the tests recommended on here, and have posted the videos below. Apologies for the poor film work but its hard with just one hand. Not knowing what an excessive vacuum is, i would be interested to have your views.
Once again cheers!
Last edited by wateece; 12-09-2012 at 07:22 AM.