I've tried collimation and have 2 questions.
http://i.imgur.com/TerhJqQ.jpg
1) I collimate with the cheshire being as close to the focus as it can get (turning the focus so that the cheshire gets as near to the telescope as possible). The closer I get a black square (marked by red arrow) is getting bigger. On images representing good collimation there is no such square.
2) How to look into the cheshire "the right way"? I try to look into it without much angle, but when I move my head a little the "crosshairs" move quite significantly (green lines illustrate this)
Note that this image is not from my telescope, but I edited a picture from Astrobaby's guide to represent my view.