Overlapping geometry is something I typically try to avoid; it could cause artifacts when smoothing or rendering, and there's some other issues when it comes to compatibility with other software, especially if a geometry is going to be fabricated.  This one isn't, but it's still a rule I like to adhere to whenever possible.

I could taper the geometry along the spline using a modifier like FFD, but for aesthetics as well as realism, I'd rather keep the tubes a uniform diameter.  I'm thinking intersection may happen here regardless.  I may reconsider the weave technique for this particular chair, and go for a more simple surface geometry.  Perhaps I'll do some detailed pouf cushions for it or something like that instead.  Undecided.

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