Re:
these tools were originally only available to dealers as cannondale didn't want the DIY mechanic to work on them hence their rarity.
sounds dumb but why are you bothering to do it yourself? the tool is £80 and a dealer should charge 90 to 135 (depending on whether you do the cartidge aswel) for the whole strip and rebuild bearing in mind that if you get it in pieces and then you discover you need parts the you then have to order those parts, so assuming you get the tool and then attempt a strip and then need parts you are looking at having your fork in bits potentially for a while, whereas a dealer could take the fork apart, work on it and have the parts in stock to rebuild it without the wait.
it's not that i don't approve of you doing it but i know they are a pain to do having worked in a cannondale dealer and i've seen the mess people make when they attempt it themselves if they don't have the correct tools or knowledge.