Joesmoe
IMOKUR2
I imagine loading the top case to capacity with ball bearings would overload rack, and at a minimum take away some the stability of the bike.
While Samuel Clemens was famous for saying, "The problem with common sense is that it isn't common", I would guess most of us with top boxes find them the most practical piece of luggage for carriage, access, extra brake lights, less easily bumped, etc. And likewise, I pack my Dr. Pepper low in the panniers and reserve the top box for lighter things such as the potato chips.
While Samuel Clemens was famous for saying, "The problem with common sense is that it isn't common", I would guess most of us with top boxes find them the most practical piece of luggage for carriage, access, extra brake lights, less easily bumped, etc. And likewise, I pack my Dr. Pepper low in the panniers and reserve the top box for lighter things such as the potato chips.