Vaccum ignition advance

[Cookiemonster]

Do i haaaaaaaave to or can i get away with changing the dizzy position? I've done it twice and am not happy at the idea of doing it a thrid time no matter how lucky it maybe.
Everytime i tried to align it the cambelt would go "click" as i let the tensioner in and move the crank, so i had to move the camwheel up a little to let it tension properly. :?

If the timing marks are out then you HAVE to redo it.

[Junkers]

Ok :( thanks for the help :)