Thanks ainarssems: Very helpful.

7 tested 150-160 psi...the 8th was 180 psi....so it appears that's w/in range.

I've ordered a bore-scope w/usb for laptop to double check the cylinders & valves. Appears to be nice option...rather than just guessing...

General DCS050 Seeker 050 usb Video Inspection System
$44.95...no s&h since minimum order was $40...! Of course I am not sure about s&h for uk or europe...

http://www.testequipmentdepot.com/ge...2398?ref=gbase

Hope this might be helpful...Happy New 2011...Year !!!