What I am seeing is the higher rate I charge them at, the quicker they peak, putting fewer MaH into the cells. Also the voltage drops much quicker in use.

I have 12 cells, charging 4 at a time. I got my best results yesterday charging at 1.3A with a cutoff of 13Mv. They came off slightly warm and I put about 1200 MaH in each group of 4 before they peaked. My next race is Saturday, so I'll see then how well they hold their voltage thru the day.