So, I did actually buy the FX-951, and so far, really like it. I already burned myself on it (within the first couple hours) by muscle memory taking over and a finger trying to "balance" the iron, and accidentally touching the "tip". 's what I get for trying to solder something without using anything to "hold" the item.
While I agree that the FM-2032 doesn't work very WELL in the standard stand, it does work okay, and I haven't had any issues with it falling in. But, I also don't solder enough to be able to blindly put the iron back in the stand, so I'm looking when I place it. I do know Louis Rossmann does this same thing (uses the FM-2032 with the standard stand), but he admits that's because he's cheap. I didn't buy it because I'd have to swap sensor cables, and I don't want to have another stand on my bench. Yeah, Hakko probably could have "made it work" or at least just sell a replacement yellow "holder" to swap out. =/
But so far, I really like the unit.