Marv,
Great to see another Unimat SL user and the improvements. I too have one that I purchase in 1970 and decided to make some improvements (see Homemade Lathe Modifications ). I plan to keep mine as well because there are things it does well for its size. I found replacing the factory motors with the Unimat continuous duty U-100 motors let me run this machine for hours and have no worries about burning up the motors.
Paul Jones