So I measured new stems and they are similar to clears, but have that little nub on the x axis. I have just been filing those nubs off, and have had gmk and SP SA caps on old version box whites and navys for 6 months now, and today I don't see any cracks. I was hoping the new versions made this unnecessary because it takes hours to do right, but apparently it's still suspect.
I did put some spare gmk caps on new jades for a day while waiting for a pcb, and none of those have shown cracking yet. But I don't know if I have the patience to file the jades for an 1800, leaving my only alternatives as a set of gatistotles I have sitting around. I love the sound and feel of gatistotles, but the crooked stem aspect is daunting even though I have a bunch of extras.
So I guess this means there's currently no way to get good off the shelf or non-crooked clicky switches.