I have a GE model GFC700r 02 garbage disposal that jammed. I can only access the impeller from the sink with a broom handle. I've seen where other disposal models have an allen wrench hole on the bottom of the unit that allows you to rotate the insides to loosen or free whatever is jamming the unit, but this one only has a plate in the center that hides the wires inside. Is there a key hole under the wires? There must be a few things jamming it because even when I try starting the disposal while giving it a turn with the handle, it rattles for a turn or two then jams again. Since I can't see where or what's jamming it, I think I'll have to remove it totally (something I don't want to do with my small amount of experience) to get at the problem. Any suggestions? Oh yeah, I can put two extenders on a socket wrench that reaches the center nut from the sink, but I can't seem to get enough strength behind it to free the jam. I'm also trying to be careful not to damage our brand new sink that was installed with the new countertops. Anyone familiar with this type of disposal?