Ok, first off, I have to question the wisdom of using 1/2" for such a large structure...
You should be ok. The forces on the struts are actualy trying to rip them apart
. If the bolt at a juction were to suddenly dissapear, the struts would spring apart. The whole structure is under tension, not compression.
Get them as straight as you can and make doublely sure there are no cracks around the bolt holes and you should be ok.
Again... I'm a bit surprised that 1/2" was used. 3/4" minimum should really be the rule...
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Honey Badger don't care. Honey Badger don't give a shit!