When the slide is removed, the hammer and other frame components are not related. I think the exploded view is confusing you.
I simply need to remove the firing pin retainer plate and the firing pin and spring. Something I commonly do on 1911s (which this design duplicates).
The difference here is that unless I'm seeing something that isn't there, there is some sort of peening or epoxy that holds that firing pin retainer plate in.
On 1911's it is simply the firing pin itself that holds the retainer plate on. You simply depress the firing pin, and manuever the firing pin retainer plate away from the slide.. the firing pin 'springs' out with the spring and you happily clean out the housing with a q-tip.
This firing pin retainer plate is either so tight that I cannot apply enough downwards force while the pin is depressed (therefor requiring a custom tool) or there is something else holding it in place such as a peened surface or epoxy/adhesive of some sort.
My money is on both.
I await a call from one of the R brothers today. I'll let you all know what I find out.
I'll make one more point.. the R9 characteristically has light firing pin strikes. Once some crud built up in there, this could make the problem worse. Becuase of that, I think it would be good to know how to dissassemble and clean this portion of the firearm. We'll see what the R Bro's say.
Thanks everyone for your support! What a great forum!