In regards to charging and delta peaks. Lately, I've been charging at 5amps with a delta peak of 30mv for the entire pack and they come off warm but not hot. This is on an LRP Pulsar Comp charger. Nothing fancy, it does the job and the cells easily make run time on a 7 turn motor. If it's cold out, I might bump the delta to 35-40mv per pack.
Also, I've been using a spintec battery manager after each run and right before the next charge, I put the pack on a Novak discharger set a 0.5V cutoff per cell. The spintec is supposed to bring the cells down, the Novak tray equalizes.
Here's a pic that a friend of mine took this past weekend. Thanks goes out to Cliff Black and Team Orion for the photo.