Best Damn charger! Thanks master crasher.
I bought this charger only on the strength of this thread. I have used it only once (tonight). I used it to charge a 6s A123 pack that's been sitting on the shelf for months. The cells measured about 3.4v each, it's usually about that point when my current charger slows right up to balance the cells (it takes ages). My packs are made up of reclaimed cells from disfunctional dewalt packs so balancing is essential.
I charged them up at 6A (yes I know what was said earlier). I swear it was only a minute or two before the charger stopped. Highly sceptical, I plugged the battery into my battery checker. One cell read 3.61 and one 3.59 and the rest were smack on 3.60

If it keeps performing without issue then this will be the
best damn balance charger I ever had