I just measured (approximately) what tensions I had got when I originally tried to follow the official assembly instructions without measuring tension, and they ranged from 1.9 lbs to 3.1 lbs. So at least some of them were outside the recommended range of 3-10 lbs, and they varied among each other by 50%.
More experienced builders can probably just tell what is a good tension, but newbies like me can’t.
Using the deflection formula, I think I now managed to adjust them all to within about 20% of 6 lbs (taking into account that I have a rectangular build, so the sides aren’t all the same).
Here is a picture of how I was measuring the deflection.
[attachment file=85427]
