Ive been looking to buy a compression tester for the odd occassion i need one; im looking at this one...
http://www.ebay.co.uk/itm/Automotive-Petrol-Engine-Compression-Valve-Tester-Tool-/220773144436?pt=UK_Diagnostic_Tools_Equipment&hash=item33671ad774
But wondered, am i going to get the end down the plug hole?