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Someone posted earlier a method for aligning a finder\RDF etc without requiring along distance object.
He basically drew a target with two points to aim at spaced the distance between the finder centre axis and the scopes centre axis, eg 200mm or whatever it may be. He pinned the double target on a fence as far away as possible and oriented the target rotation so it matched the scope\finder configuration. Lined up the scope and checked that the finder saw the second target spot. Adjusted to suit.
Probably not quite as accurate as a good long distance target but should get it at least within a usable range.
My RDF and finder are never bang on target, a close approximation is good enough in most cases.
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