My Solarforce L2 host has proven reliable. My L600 model was an absolute piece of junk. Still, I liked the concept behind it and spent quite a bit of money putting together a high-quality version of it. Leef 2x18650 C-M body, head and tailcap off of a Surefire M4, Lumens Factory lamp designed for Surefire M3T.
I did manage to salvaged the excellent momentary tailcap that came standard on my L600. One of the best non-Surefire tailcaps I've ever used . . . And Solarforce apparently discontinued it. :shakehead