Hi mate i'm in Scotland.
The cam and tappets havn't been out of the head since removal, the head was removed a couple months ago and lives in my house at the mo.
The top end was quiet when on the car mate, no rattles or anything.
With regard to the double valve springs, i'm not sure tbh. Is it obvious when looking at them?
If so they look like one single coil if you know what i mean?

Any more questions just ask!

Grant