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  1. 17-04-2015 #1
    Isaac's Avatar
    Lives in Manchester, United Kingdom.
    Isaac
    Last Activity: 30-11-2017 Has been a member for 9-10 years. Has a total post count of 45. Received thanks 3 times, giving thanks to others 0 times.
    Did you replace the mirrors?

    Also, try grabbing a torch(with the machine turned off!) and look at the first mirror so you can see into the tube. There is another mirror. Check there is no cracks in it. Is it giving the crecent cut after going through the focusing lens, have you gota picture of the lens? It could be a problem with the tube but it could also be the lens.

    Isaac
    Last edited by Isaac; 17-04-2015 at 12:15 PM.
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