You know, I'm not certain but it certainly feels like it could be.
The 907 handle is not a particularly bad handle to work with, just takes a little getting used to as it did back in the day with mains driven irons
but we learned how to adapt with the different size of iron handles from different makers and sizes.
EDIT, My handle is now with a local shipping company so it could be here as early as tomorrow.
BTW, in those YouTube videos of the LEDs did you spot the soldering irons that most of them were using, they looked like 907 handles to me and had K type tips fitted.