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yep, i noticed that also. But i was thinking if someone could find an old swingset they could possible take them off and get new pipe to fit, or just use the whole swingset possibly, thinking...

Are you still working on this stand? I came across a web page that had parts for swing sets and saw they had "Swing Corner Right". Shouldn't something like that work for the top bar?
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Do you think a pole like a TV antenna pole would work? Would it be lighter? One advantage would be that it comes in sections with the coupler already built in on one end.