One of my older burners is a 40/12/40A internal drive and works well with CDG.
MTU sold this drive a while back. I might mention that if the drive was not purchased through MTU, there is a possibility it may not handle cdg. It should, but MTU has to test all the drives they sell in order to be able to be certain they will handle cdg.
The only way to know for certain is to try it with the free Microstudio Demo
listed at
http://new.mtu.com/support/demos/code-microstudio.htm
George