Brake fluid resevoir emoval

I'm finally getting around to a brake fluid change. I have the bleeders all broke free, fluid & vacuum (liqiVac) or gravity, whichever works best. After sucking the old fluid out of the reservoir I see that it has a film around the inside that I want to clean out. How do I remove the reservoir to clean it properly? It looks like there's a small roll pin toward the fire wall that needs to be tapped out. It goes into the master cylinder in what looks like 2 other places, O- rings? What am I going to find under the res. more film that needs to be cleaned? I probably don't want to spray cleaner down the MC right? Damn, I thought I was doing so well....lol.

Yup, those two pins need to be popped out, a small nail works great with a hammer.

Then those o-rings do hold it slightly, but not much, should pop right off.