" My damper rod has the cross pin in it like yours. I am thinking of doing the cartridge emulators as well, so I am hoping that your cutting of the pin works well. What would other options be if this does not work?"
Eh, just cut the pin and call it good. Mine hasn't budged in the slightest.
Machining out the inside of the damper rod to fit the emulator is a bit more tricky. But if you have Dremel skills totally doable. And, again, judging from the slop of the later model damper rod, it doesn't appear necessary to worry if it is a tight fit or a shad loose although I personally would have to think a well machined fit would be best.