Little hurdles occur as build progresses. The four struts attach to the RTT frame/attachment points. As seen here at top of picture,
This connection needs to pivot, and needs as little slop as possible. Because the fasteners are 5/16" dia bolts (grade 8) and the inner dia of the 1" tube is approx 3/4", I had to come up with a solution to keep the bolts centered within the tube.
My solution
Some 3/4" OD tubing and 1/4" flat washers whose combined length is fractionally greater than the 1-1/2" length of the 1" tube. Resulting in secure connection that allows the strut to pivot freely around the mounting tabs.
These tabs are to be welded to two lengths of 1-1/2" x 1/8" steel angle, 4 tabs, 2 struts per length. Each length of steel angle is then bolted to the fixed base of the RTT. I finish doing away of the 'factory' aluminum RTT mounting channels and reinforce the RTT base using a 1" x .095 square tube. As shown in the first picture - specific locations TBD.