As I mentioned in another thread, I'm trying to replace my old Kenmore garbage disposal with a new model since the old one won't work. I had trouble getting the rusted metal ring to move to remove the old unit but I finally got that stubborn sob to turn and the disposal is off. So now I'm trying to remove the rusted ring and the flange. I watched a couple videos and they said to remove the snap ring so that the assembly would just come apart. But there is no snap ring. No rubber there. But ole rusty doesn't want to come off. This is what it looks like from the underside: And the side underneath the sink: And inside the sink when I lift it up: Sorry for the last two shots, it was an awkward angle. I can't seem to find any seams or spots where this comes apart. My vision is not the greatest. Any suggestions on how to get this thing off without damaging the sink? Also, how much plumber's putty should I use when I put in the new flange?