[Chaos-l] focuser installation

[Michael Hrivnak]

I got a new (to me) focuser in the mail today.  It's a GSO crayford 2" single-
speed focuser that I picked up for cheap on astromart.  It was allegedly 
pulled off of a 12" Hardin dob, but the curvature fits my 8" dob perfectly.

I want to install it on my 8" Orion dob, which is one of the older sonotube 
ones.  This will replace the terrible R&P 1.25" focuser it came with.

Any advice?  How do I get it perfectly square?   Also, I'm looking for a piece 
of thin sheet metal or something similar to make a back plate.  Any 
suggestions on that?

Thanks,
Michael
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