I´ve talked to the Duralite guys, and it seems I have the wrong battery leads even if I bought it as a kit for a specific setup, and they also recomended me to use the regulator with fail safe sw, also they are going to exchange it for me, that is nice.

On the other hand I looks that discharging the battery to measure the milliamps maight be the only way to detect a bad pair of cellls in the redundant batteries. Of course it must be noted the safe maximun discharge voltage to avoid damaging the batteries.

Redundant systems are more real world systems, Aircraft Electronic Engine Controls are dual channels, and it is very very rare to see an inflight shut down, that does not mean it will happen, same applies to good quality systems in RC.

Regards