I am building a machine for cutting R/C wings. I am using the drawer slides and the Dray Construction plans. I have a build thread here
I was not certain about the drawer slide design but having built the mechanical parts of it, it feels very smooth and stable. I have not cut anything yet so we will see.
I am using very high load carrying, low play drawer slides I sourced from my old work. They are used for the drawer slides in refrigerators. I had a look at the standard stuff you can find in Bunnings and I felt they were unsuitable.
Have a look and see what you think.