cheshire will do nothing for you
Auto collimator will! as it will align your secondary to the optical center of your focuser. As the primary is a floating primary, you then utilize a star test to do it right. by focusing the star and then taking a snap of it in each coner, you then chase the flair back towards the center.
its a long arduous process but it works.!
on the other hand if it was a fixed primary....
it would be quite easy