(1) A lever and a 'W' shaped piece of metal that you shove between the camshaft and the edge of the bucket ( on eBay )
(2) My CLYMER manual shows a tool that clamps on the side of the head and leaves the camshaft unmolested.
The latter seems to be like rocking horse poop (ie: hard to find )

Which is best ?
Is anyone lending one in the Bucks area ? would sure help me out !
Thanks for reading.