Howdy @vapen00b - like your chosen name! I have the Pax 1, Pax 2, E-Livi8, Grasshopper, and about 3-4 different pen style oil gizmos (1 is refillable, the Kanger Mini-Pro). I have tried a number of others - Firefly, Volcano, Solo, and a couple other that escape me now. If funds were unlimited...