Agreed. The 31 has morphed into an IED. You don't want to go to the next stage where it gets violently carsick. The cells actually boil and fume over. Hot, angry, hungry, sulfuric acid. Holes battery trays faster than a speeding bullet...
When you get the 1275 "season it" with 72 continuous hours at 14.0 volts. New 5% antimony batteries love to be seasoned for some reason. Remember, even a "fresh" battery accumulates a month or two without benefit of float charging. The two Trojan plants are located in warm weather climes.