i can't see that link you posted jack???

I have built a couple of packs and have the following things to pass on

i would reccommend using balance wires and a balancer, remmebr the balance wires have to be all the same length

i would say glue your pack of 4 or whatever to gther first then solder much easier

big hot soldering iron

and ebay is the best place i would say (take cuation) the a123 cells seem to be green atm this is ok

couple of links

balancer ( you will need a hyperion charger to match can't find the one i use atm

http://www.rcdude.com/servlet/the-165/H ... Net/Detail


enjoy