In all my installs, I've dropped two. Before I start on any job, the floor is swept super clean, just in case. Pretty good rate if you ask me.

This explains Alex's text. Don't worry at all Alex, even if I dropped the whole motor's worth of keepers, the parts box on the shelf (one labeled "misc") has enough for 2-3 motors and if that doesn't suffice the two scrap motors in the back of my truck can become donors in seconds.