I just made my first box mod. I used the 3.7 volt box mod kit from madvapes, because I assumed it would be the best best for my first try. I wasn't prepared in the soldering department, as I had never done it before. I fixed the negative line to the battery several times, and when it finally worked (as it is now) it is really just a big glob on the atty connector. This process also made me lose the LED connection somehow, but I don't want to trouble shoot it at the moment because I now have everything working. I epoxied everything in place, starting with the switch because its resting position made the two connections touch. I think it looks pretty good for the skills I had to put into it, and I am in love with the increased battery power and life. Here are some pics, let me know what you think and if you have any advice.

and another

One thing I gave up on, and would appreciate advice with, is getting part of the wire insulation onto the LED. I tried and tried, and couldn't get the dang piece of rubber onto it. I even tried widening it with a needle, but that proved fruitless (and painful).

and another

One thing I gave up on, and would appreciate advice with, is getting part of the wire insulation onto the LED. I tried and tried, and couldn't get the dang piece of rubber onto it. I even tried widening it with a needle, but that proved fruitless (and painful).