Well I had been rocking out a brass fitting ecig (http://www.e-cigarette-forum.com/forum/battery-mods/92610-pipebomb-log-mod.html) and was planning on making a copper pipe mod for the wife. Well after blowing up all but my nastyest 801 attys I decided to make 2 of the copper pipe mods, one for me and one for the wife. Both have a 510 connector and 2 3v cr123a batteries, Im using an 510-901 adapter to use up some of the wifes stockpile of 901s and she will be using a standard 510. They came out fairly well, very simple build. Atty connector - switch - spring. One has a loose strand near the atty connector so it shorts a little every now and then (atty heats up without touching switch) so Ill have to tear it apart but they both work great. Just need to paint em.