Hi Yugami, The G in VMG stands for a "graphite" These were machine that have a positive oil flow to the rails and ball screws to help move the graphite away. They are also black in color, ( to hide the graphite) they also usually had a Torite dust filter system on them.
You might squeak one in a 8 ft. door.
The C7 machine you not say what machine it is.
PM me the machine auction info and I will take a look at it for you.
sportybob