My first suggestion would be to buy a set of Bobs Knobs collimating screws for it. Whoever decided that it was a good idea to make you wave a sharp pointed object around the corrector plate in the dark to collimate was a twit.
Secondly it really is easy for the SCT, as noted above, defocus on a bright star (Make sure it is not a binary like Rigel, been there
) and see how close the diffraction circles and shadow of the secondary are to concentric within the image of the star. Then using the hand controller, move the star off to one side to find the direction which makes the star image look better, if you can move it far enough to get it looking all concentric in one step then good, adjust the collimating screws to bring the star back in toward the middle of the field of view (Which should bring the point where the star looks right closer to the middle of the FOV)
A couple of iterations of that and you should be pretty right, you can then try refining it by looking at the star under the highest magnification you have available, in focus you might be able to make out the airy disc which should be nicely centered on the image of the star and out of focus it just makes it more sensitive to collimation being right.
It can make the difference between an OK view and a really nice one.