I also have difficulty in wrapping ni200 coilsI'd strongly recommend you to stay away from ni200. It has a high tcr, yes, but the low resistance and the softness of the material makes it difficult to work with. Ti01 is much better, and ss316 even more so.
Sent from my M7_PLUS using Tapatalk
sent from my Galaxy Note 4 using MOAR 2.1b ROM running tapatalk