Viola: Stymied!

Completely disappointed by the new Grabit bits I got.  I may just need to refine my technique, but in some cases the extractor wouldn't really "bite".  And when I did get one to bite, the drill just wasn't powerful enough to move the screw (which I guess is not really the fault of the extractor).

The other downside is that now that I've drilled the screws out for the Grabit, I have much less material to try and reslot it for the impact driver.  May end up just having to really drill one through for the first time.

The only bright side was that the "pencil test" showed that Viola's camshaft is indeed the S90 grind.