Tom, your comment..... "the aluminum adapter always broke on impacptpt." you said always, that sounds exactly every shot. Thanks for clarifying. I also know that some people have had more steel adapters break off than I have with aluminum.
Not to say you didn't have issues, but my experience is 180 degrees from you and DNewer.
From literally thousands upon thousands of stump shooting with judos, from TX bunnies to a bison over 2000#s, no telling how many deer and hogs, and many other critters. I have all the confidence in the world with aluminum adapters, and have seen zero reason to change. Again, from mostly 60 - to 70# bows and 585 grain arrows to 650 grainers.
Again, that sounds very odd to me that's all. Not arguing with either of you, it just sounds like there could have been other issues causing y'alls experiences.