Here is an image of my last print.
You will notice that the raft is too thick to be practical. This is a configuration issue that should be easy to fix in the future. I was attempting to print a pully from the Darwin STL Library and got past layer 8 before the Z axis slipped.
The next step is for me to get my Z axis more solid so this never happens again. I am seeing that the weakest link of my Z axis is the motor coupling, so that is where I will direct my attention.