I had trouble a few months back with my Halo surging. Long story short, FK sold me a new moter. I trouble shooted cords, Critical power source, my coils ran fine with consistent numbers but the Halo was all over the place. Hz runs 16 to 174 to 260 then back to wherever never steady. Same with duty. 35-41. I've never paid attention but is this normal for the Halo rotary? The sound of it running is how the last moter sounded before it started surging.
With my last moter I thought at first it needed lubing it had been a 8mo -yr since I last did it. I only use it for eyelining. It looked fine but I wiped it down and lubed, same thing then I thoughtWTH, I'll lube it again before I bug Gaston. Apparently relubing was a bad thing because there was some oil in the moter and they wouldn't cover warranty so I just bought a new moter.