I've lost a couple of studs between my front and rear Innovas.
Because of Juha's post, regarding restudding Innovas, I called my local guys and they have the tool.
I'll go down Monday and get my missing studs replaced.

I have two complete sets of wheels for my commuter: one with Panaracer Tserv's and the other with the Innovas.
Any time I have enough bare pavement to feel safe, I put on the Tserv's because they just feel sooo gooood.
I probably only have a few hundred miles on my Innovas, and they still have the flashing on them from coming out of the mold.
They feel weird on bare pavement, so I switch back and forth quite frequently, sometimes several times a week.