Hi John, I'm new to reflectors as well, after 30 odd years of using refractors.
I was told by a wiser person than me to buy the combo Orion unit from Bintel.
The reason being, you use the cross hairs at the bottom of the tube to line up your secondary spider. You adjust the secondary collimating screws until the hairs are superimposed onto the spider.
The view beyond the crosshairs is your centre spot from the primary mirror.
You then adjust the primary screws until you centre the spot in the collimation e/p.
I hope I've made this clear enough
if not let me know. Cheers, John.
