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I made myself a adapter out of 6mm steel pipe which had a inside diameter of exactly 140mm the same size minus a mmm, or there abouts and it worked a treat.
Picked up meter of the stuff at second hand scrap metal place, for the grand sum of only 20 bucks.
As for the pier itself it is best to get hold of a decent length of sewer pipe with a diameter of about 250mm, plonk it on you 600mm x 600mm footing and fill it with cement.
Make up a wooden template with four 1/2 inch bolts about 15 inches long bent into a hook shape at one end and push that down into the wet cement so the template rests on top of the 250mm pipe.
Let it cure for a least 7 days and presto one pier.
As you can see i just used two 3/4 inch Aluminium plates being 300mm x 300mm square.
Leon
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