Building your own li-po pack?

I made 2 2s packs out of those cells last month. So far they are working great too. Building the pack isn't to hard, just make sure you buy the wiring harness for the balanacer too. and DO NOT SHORT THE CELLS (tape off every tab when not in use and tape off the two tabs that get soldered together after they are soldered).
I will probably buy another 2 or 4 cells soon and make some back up packs, it is hard to beat that priceand I have not yet noticed an issue with the extra weight they created (taking it to the track this weekend so that will be the true test).