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A few hints on collimating binocs....
Get a few different people to check them as well. I found that quite a few people are a bit cross-eyed and will look through some binocs and say that they are fine but they are not at all!
I remember once when I was a uni stewed ant, someone (not me!) dropped the physic's dept binocs (25 x 80) onto concrete and they were way, way out - every star was now a double! And doubles were now quadrooples.
I gave the binocs to the physics technician and he had a look through - bad idea. One of his beady eyes would be pointing straight at you and the other would be looking at the roof. I had a few problems convincing him, without offending him, that the binocs were actually really out of collimation.
The other time I had a similar, although not as bad problem, was when I had my Carl Zeiss 7 x 50's professionally cleaned. The guy that did it cleaned it very well, but once again, his eyes were a bit out and I had trouble convincing him that the collimation was out - not enough to be a problem for normal daytime use, but certainly for astro use.
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