RE: Anderson Power Pole Connectors. Have you had a failure or not?
I have been using 4mm bullet connectors on 10s packs. No problems.
I did not bother with deans or standard AP connectors because their relatively low current rating. I recall it is something in the neighborhood of 65A. While that for 4mm bullets is around 85-100A.
2sunny,
The FMA adaptor board for 10s charger is bulky. I found I do not need all other sockets except the one for the 5s. At the end, I just obtained some JST-XH female connector with wires, cut the board loose, and soldered the female connector to the balancing wires from the charger.