Nice looking stuff, guys.
Kramer-What size/type of pvc pipe is that? Care to share any more pics? That's along the lines of what I was thinking. What do you mean, whittled it down? Inside or outside diameter?
Aurum-Those look sweet, but I am in the U.S.
To both of you-how do you make up the extra length? The 18650 is roughly an inch and a quarter shorter than 2 C cells.