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Dont forget to order the cheshire with cross-hair's David. (although they probably come standard these days, not sure?) The cross hairs help centre your secondary under the focuser, instead of spending more buck's getting a sight tube.
The barlow I ended up with is the Meade series 4000 2X apochromatic telenegative amplifier. I cant compare it to anything else...but it doe's a marvellous job.
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