I used the alum struts like Larry Williams. The aluminum insert is 7075 aluminum that I got from Mcmastercarr.com. The bottom fitting (not shown) is the 7075 insert, that I tapped for J-3 forked wing strut fitting (ACS or Wag Aero?). Inserts are bolted through the strut with 1/4" bolts. Dan Helsper
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