I would not use Sliders. When tuning your Variator, the slider weights are not consistent with the roller weights. Seems like a gimmick to me. Tested back to back on an Icebear Maddog 139QMB 50cc. I test them with the stock variator, the Polini high speed 95mm variator and the NCY performance 89mm variator.

Adjusting Roller Weights:    • Maddog 50cc Roller Weight Test.  139Q...  
Variator Size:    • Size Matters.  Maddog 50cc Variator S...  
Rip Off CVT Kits:    • Are GY6 CVT Performance Kits a Rip-Of...