Its not just brushes 99ninety,

Constant truing of your comm will wear that out too. Then a new armature is required. They arent cheap. And imagine the beautiful feeling of not having to worrying about retruing your comm before the next heat at a big meeting. Mmmmmmm, just sit back and have a Coke Zero and a cucumber sandwich.

Total bliss. I will have 2 5.5 Novaks please