Thanks all for the kind feedback and comments! I just see so many great and amazing builds going on here that I sometimes feel my work isn't near that level and get a bit self conscious about posting....
Concerning the Modelkasten rigging line.
-It is black - I do not mind that but some like silver etc.
-it is elastic but somewhat more like fishing line vs. other brands of elastic I have tried
-it is round in cross section - there is none of the flatness and visible twisting of the line that I experienced with other brands
-I used the .13mm kind (vs the .2mm) and think it looks good on 1/32nd scale
-I had no trouble feeding it back through polymide tubing unlike other elastics I have tried.
-I purchased from Hobby Link Japan (hlj.com)
I have some large temperature swings in my home and the models I have rigged with fishing line have shown significant sagging so being able to use a elastic line like this seems to be an excellent solution to keep them tight.....