Hi
Houghy bought over his Vixen 8 inch f4 Newtonian, along with his Catseye collimator
http://www.catseyecollimation.com/
Got the Vixen showing just the 1 triangle as per instructions, then checked out my 6 inch f3.6 Cometracker, only to find out that it was out quite a ways, so git it perfect too
The Cateseye can be fiddly but only because it is so precise, you literally have perfect collimation for it to be showing the correct result. The slightest adjustment easily shows up. Now all we need is clear weather so we can use our collimated scopes
Scott