[pgc hunter]

Originally Posted by AstroJunk

Just make sure that Peter hasn't off-set it on purpose. I don't bother with mine, but the text book says you should...

http://www.asnsw.com/info/offsetcalc.asp

Mine's actually offcenter towards the front of the tube, I asked Peter about it and all I have to do is move it towards the primary using the collimation knobs. When it's centered in the sight tube. When you've made the secondary concentric with the bottom of the sight tube, that automatically incorperates the offset.