The GC-5000 is not made by Precision, instead Blackmer. So after doing some research I am pretty confident the GC-5000 is a Blackmer LB081B.
Here is the parts list.
502-A01.pdf (1.2 MB)
Here is the tool list.
cb110.pdf (318.8 KB)
I ordered some spare parts and will know if I was correct in a couple weeks. Maybe this info will help someone else with a GC-5000.