We have an old Vitamix blender in our Mexican restaurant that recently started acting up. Generally, our first instinct is to replace these sort of "broken" appliances, but I've been on a DIY/Fixing things kick lately, so I took a look to see what I could do. I saw the old drive socket's "teeth" had just worn down and googled the part. Sure enough, here it was on Amazon, and the piece seemed easy to replace. Once received, things were simply enough. Tak..