I don't hold a lot either but am holding on to what I have.
I talked to a friend of mine who is a tool pusher in the gulf about DDI and Mako. He was very familiar with Mako and did a little research on DDI for me. He said to hold on and accumilate shares; that 08 was going to be a banner year for service companies and this one was in a very good position.
Of course this is all opinion, but good ones as far as I am concerned.