As I finally read thro all the post and so I don’t put up a tip that has already been posted I think I got something someone might be able to use.:p Using the duplication Options box you can make all kinds of cool things that would be rotated. Like a staircase or in this example a chain. Just open up your duplication options box in your Edit tab and set a torus up to be copied. Keep copy checked and set Group under to world. I have my grid set up to units of 16 by 256 so I had to scale up my torus then set up the Y-axis in the options box 122. 45 leaving the scale set to 1 and instant chain.