Finally finished my own version - I used "Mike's telescopic EMT conduit clothes line tensahedron" as a guide. The bottom part of the legs are 1" EMT conduit with the upper part being 3/4" EMT conduit. I 3D printed some sleeves to go over the 3/4" EMT to remove the slop when nested in the 1" conduit, so there is no wiggle there. I made some soft shackles (not sure what to call what I made) from 7/64 Amsteel I had laying around which ties the ends together. Did a test run in the backyard last night with my son and it worked out perfect!
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