One last thought - Beef bones? I see that Consumer Reports tests these things by measuring the fineness of the grind using beef bones. Do people really put beef bones down a garbage disposal on purpose? You might think I'm babying mine, or maybe that's why I didn't have excessive vibration when I use it, but I'll put the beef bones in the trash and grind up the rest of the stuff with this and be just fine for many years to come, I hope!

Many localities in the United States prohibited the use of disposers.[8] For many years, garbage disposers were illegal in New York City because of a perceived threat of damage to the city's sewer system. After a 21-month study with the NYC Department of Environmental Protection,[9] the ban was rescinded in 1997 by local law 1997/071, which amended section 24-518.1, NYC Administrative Code.[10]
^{The quick resolution of the Kuchino problem was covered favorably in the Russian media, but hardly represents a systemic response to the problem of municipal waste disposal. In fact, Putin’s recognition of what he called “the legitimate negative reaction of people” to widespread problems with trash disposal may have emboldened protesters near other landfills.}
Garbage protests in Volokolamsk and elsewhere have exposed weaknesses in Russia’s system of political authority, often described as a “power vertical” in which government officials answer not to their constituents, but to their political superiors and ultimately to President Putin. Facing unresponsive or incompetent officials, citizens turn to Putin as the only one who can solve their problems.
In most cases if your garbage disposal is humming it is because a foreign object is stuck in the disposal. If an item has been jammed in the blades of the disposal they will be unable to rotate. This can result in a humming noise. If this is the case simply unplug the disposal under the sink then survey the drain hole. If you discover that an object is stuck in the blades remove it. Once you have done this you can plug the disposal back in and flip the switch. This should clear up the problem.
Release the old disposal from the mounting ring. At the top of the unit you should see a thin metal ring with 3 separate lugs, or protruding arms. Take hold of these lugs with one hand and twist the entire ring counterclockwise about 1.5 inches (3.8 cm) to dislodge the old unit. Set it aside on a sheet of newspaper or unfolded rag to keep from making a mess.[4]

The large-capacity disposer chamber boasted by this GE The large-capacity disposer chamber boasted by this GE 1/3 HP Continuous-Feed Garbage Disposal features a cold-rolled carbon steel armature shaft and dishwasher drain connector. It also has a stainless-steel sink flange ensuring durability and providing ample space for waste disposal. The disposer harnesses the power of jam-resistant dual stainless-steel swivel ... More + Product Details Close

Another common cause for a leaking garbage disposal is the disposal flange. A leak at the very most upper area of the garbage disposal could be the garbage disposal flange which goes through the sink. A garbage disposal flange should be sealed with Plumber’s putty and then tightened from underneath the sink. If this is not tight enough or if it has managed to come loose (which can happen) then the garbage disposal will have to be taken down so the flange can be resealed and then the garbage disposal can be rehung.