need help building mechanical bottom switch

[g3n3r1c]

I'm building my own mod, got some 6061 aluminum tube and rod for the body, brass for the switch and connector, a delrin rod and my lathe. I have a fair idea what I'm doing but no plan for the switch, any help would be greatly appreciated.

 

[yuanzhi]

http://www.e-cigarette-forum.com/forum/battery-mods/260516-copper-tube-mod.html