The later models have plastic caps so less or not repairable like your older copper version.
I was kind of thinking this as well about a repair job might leak elsewhere but maybe it won't. Kind of a crapshoot like the rest of this heater core debacle.
My thoughts exactly on the brassworks reviews. Yeah it might not leak and last longer but it apparently it sucks at its main function, heating the jeep. It also costs $360 now. I just bypass for $5 and have no heat just the same. I can even use a brass bypass.