bought some used HO code 100 flex ns, any info appreciated

[nyc4me]

absolutely right! I didn't even think to check, I've got some MP flex here and sure enough, exactly as you say.  There are also a few soldered on joiners which were cut too but the melted portions were cleaned up pretty well. Thanks! 

[michaelstevens]

That's the Model Power stuff.

Trainworld sells it by the box for 75% of its price for Atlas Flextrack.

I bought several boxes back when it was only $100 per box.

I actually found that MP was easier to work with (free-er flexing), than Atlas  --  also the tie-clips are smaller and a little closer to scale. 

Watch out for melted tie-clips near the ends  --  if they were soldered.

[nyc4me]

on the bottom, it says what looks like "GT - Italy" every few ties and and a "1" or "2" two ties after that. anybody know the history of this type track. Measures close to atlas code 100 flex so I think it'll mate just fine. curious about what it is, never saw it before. thanks!