Hi OSTexo,

re:
> Is it fair to say the blend curve tool will not keep the center rail curves equidistant from one another so the
> swept circle profiles will intersect?

That's correct, Blend curves generated between different curves will not be guaranteed to be equidistant from some other previously generated blend curve.

So instead of using blend multiple times the other solutions discussed above in this thread are:

- Use the same one common rail for generating all the sweeps instead of making individual rails for each sweep.

or

- Use Transform > Deform > Flow to deform a full block of pipes all at once.

or

- Use blend on one piece, and then for the other rails do a Construct > Offset on the Blend instead of making separate individual Blends.

- Michael