Tony no that was my point. I DID remove them all insitu removing/prying the spring clip and it was a NIGHTMARE. And I ended up breaking a couple of the plugs. It took me probably 2 hours to remove all those damn plugs contorting myself back behind a loose airbox still sitting on top of the engine only attached by the harness. I was able to roll it around to get to the plugs but it was very difficult.
I discovered later on that all you have to do is use a TINY little bit of leverage with a screw driver on the base of the plug and it pops right off quickly and safely. I'm still kicking myself. Learning the hard way is a virtue. Like you said they are only springs. They don't need to be removed at all.
I always laughed at the service manual advice for testing the CSV. How do you pull it from the back of the engine and then test it in that space with the hard lines? I think the best advice I saw was to pull the pope's hat and watch it spray from looking down the throttle body (I think this was a Tony tip). Pull the plug on the coil first or you might lose your eyebrows.
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I took no offence from your post. I think you misread what I was saying. I think opinions should be challenged. That's what makes this forum valuable.
G.