As I wait for all the parts to arrive, made another discovery: my existing air impact wrench didn't even have enough power to undo the wheel nuts on my MG.
This struck me as odd - because the Sealey gun I was using should easily cope with the wheel nuts (I was use a torque wrench to set these, so I know they're not too tight). I didn't think that the windy-gun was at fault (it sounded fine in operation, and fundamentally a simple thing). So I rechecked the flow rates of the Clarke compressor - and it is woefully under-rated. Ooops.
I'll need about 8cfm air delivery - has anyone got any thoughts or experience with particular brands of compressors? The cheapest I've found is a "Cobra" which has a range of reviews on eBay and Amazon, but mostly good (people pleased with the value of a 9+ cfm compressor at just £75), but some less good.
I don't use air tools that often - so for occasional use would this be any good?
http://www.ebay.co.uk/itm/NEW-COBRA...476087?hash=item1c6939bdb7:g:fxcAAOSwGIRXa~la