Lee: Thanks for the info. I was about to build the longer top rail version like you did and would have had the same results.
For the engineers out there:
Would cutting the pipe to have the joint(s) closer to the end of the top rail rather than one joint in the center where it can flex more? (sections of 2ft - 10 ft - 2ft )
I'm considering adding the coupling to re-enforce the joint. thoughts?
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