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Well, maybe give it a go, then get your kit off and test it out by the standard methods you already have, and even a humble film canister tool as well, it's a poor mans cheshire. That'd possibly indicate a number of things. But really, the collimation via that style would be vague at best was my recollection of trying such things yonks ago on a 10" f5 newt, as there was some flexure in the 2" crayford draw tube, a feathertouch it wasn't.
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