I'm going to make two 3S1P packs but they will be wired in parallel. I'm not making one single 3S2P pack because I have ordered a FMA 10S charger and it'll be able to charge both of my packs at once at around 8Amps
Stock tabs are fine - they were tested in this thread on RC Groups. See #18 for discussion on tabs - he calculates a tab resistance but his testing is for his planes current draw, 35amps.
This thread is also a great reference on building and using a123s. It encompasses about everything there is to know about rc useage of a123s, either directly or with links to other material.
Just ordered a couple of foot of it. Thanks!
I can't wait to make my packs and I can't wait to see how they will be done charging in 15 mins. Already received the FMA 10S and it's begging to heat up some batteries