Nice looking carvings!
There are sets of woodcarving 'gravers' you can get to use with the air powered gravers. Although since it's really just a matter of making it fit in the handpiece I dare say you can make your own.
Doesn't look like you
need any more tools for your woodcarving but I'm guessing you - like most of us - would enjoy having some anyway. :p
I'm looking forward to seeing your engraving and how your woodcarving background affects your style. I should be interesting!