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Had to go hunting for the tube! Found a 1.1M, 219mm OD, 12.7mm thick one for $100 so grabbed it. Adds an extra 22KG so things are getting getting heavy. Workshop wants $690 + GST to do the welding and machine work so gave the go ahead. Concrete pier base 800x800x800 cube is done and dusted. Not as deep as I wanted but health issues got in the way. Looks like I might have something to put the scope on this summer. Will post some pics when done.
Cheers
Stephen
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