Oh so glad you asked.
I have decided that nwt is basically circular or spiral--it starts on draw 1 with the tonic, so blow 1 can be whatever low note you desire, and the other notes can be draw bent (as say, minor 7 or major 6--I usually just put the major 7th in, for continuity).
It proceeds in spiral fashion, straightening out at hole 8, so at that point it's not spiral anymore
So holes 5-10 are like Richter 4-9, which makes transition from "normal" harmonica pretty easy.
You get all the good blue notes from the draw bends on holes 2, 3, 4, and 5 (b3, b5, b7, b9--no bend on hole 6, 'cause it's just like hole 5).
And you can still overbend to get those squawky duck calls . . .
I don't really like spiral, but I sure like those draw bends!
See attached chart for more info and also the intervals if you are brave enough to retune your own--
G