This is a very interesting coil, Pdib. I just tried it, though I don't have the testicular fortitude to do it at .5 ohm, mine is 1.8 at 30ga kanthal. For me, with microcoils, that's pretty low, usual is 2.4.
The tails dangling out of the middle are great. RM2 is a bit concave, and they dangle...