I have made this comment before, re: the so-called Tuf-strand lines   I've known people who tried them.  I don't know anyone who has tried them twice.

They are so large in cross section that there is a huge increase in line drag.  If you try them on a model previously flown with normal steel lines, the model will probably end up coming across the circle on you.

One would be much better off using a Spectra or Dyneema fishing line (Spiderwire or equivalent).  Well proven and lots of info available.  Use the same diameter as you would steel, as per Safety code.

For the Nobler/LA40, .015 x 60 feet, (.7mm x 18.5 m) as detailed above.  BTW, .015 Spiderwire is 80 lb. test, I believe.