My tool is for an Uggy, and that gun has the bushing with three pins. Not sure if the guns that use just two pins are such a great idea.
I have seen guns with witness marks to align the bushing, mine doesn't have them.
Cole Haugh went to the trouble to aneal and re-harden all the bits in my gun, and when it came back with the laundry list I sent him completed, I checked the bushings-no problem to remove either. My ten year old can do it.
I've seen a couple truly ugly repairs to integral strikers, including a metric bolt threaded into the hammer, welded, and whittled away until it went through the breech face. If you tore up a bushing, would it not be easier to duplicate than an integral striker?
I'll still take my chances with disc sets before integral strikers. When it does work right, it is really easy.

Best,
Ted