Hoosier has the shorties, but they may be 1.5, can't remember. He has the XL dual
coils in 1.25; I love 'em on the Kgo.
I think you are right about the Kgo not being cost effective. I shorted out one battery already, and on the other, the threading is finicky on the charger. After 10 weeks!
I just got a box mod; the batteries sure are cheaper!