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Hi sejanus..
I use a cheshire crosshair to align the seconday to the focuser..(so the secondary appeas perfectly round) and also to view the entire Primary in the Secondary..(you can check this by focusing fully in and out)
I then adjust the primary so that the cheshire's crosshair sit over the reflection of the secondary's 4 spider vanes..then to adjust the reflection of the cheshire's angled reflector on top of the the primary mirror's centreing ring whilst looking through the cheshire itself..this should align the secondary to the primary...from then on you could use a laser to check and correct your setting when required.
Just a few helpful hints..
If you do buy a laser..be sure it can be collimated also!!
Makes sure you perfom the collimation in quiet conditions..without pets etc.
Always collimate with the optical tube horizontal..so that nothing can fall down the optical tube and strike the primary mirror.
Buy a set of watchmakers screwdrivers and use the appropiate allen headed one to adjust the secondary's grub screws.
Keep a record of the number of turns for each of the 3 secondary screws.
Do exercise care and don't overtighten.
Use a table lamp behind a white sheet to view the primary/secondary reflections.
Be sure to take a break or three...
After it's done..give yourself a pat on the back!!!...cause it does get easier!
Cheers!
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