I struggled a bit with this on - obviously the mag base can't stick to the ram on its own, too heavy for the magnet So I took a drill chuck and put that into the tailstock and stuck the rod of the mag base into it. Long story short.
Test area: Tailstock back as far as it will go into an area where the frosting is still visible on the ways. Indicator was set as close to vertical as I could eyeball in the flat area between the tailstock vee way and the back saddle vee way. Wiped area clean with cloth before beginning. Initially had a slight problem with the indicator sliding sideways as I moved the ram in and out leading to continous changing values. I took a rubber mallet gave the end of the rod a slight (I do mean slight) rap to seat a little better, tightened up the chuck and the various "knuckles" on the mag base rods. Retried. Set indicator so that it had 220 thousands inset, zeroed it with the dial face, then ran the ram from all the way in (until I felt it starting to tighten up and pusht the chuck out) to all the way out until ram came offf screw. End result was less then half a thousandths in movement and it followed a straight path (as best as I could eyeball). Thus it would appear that the tailstock is most likely flat on the bottom and not tilted forward.
Test area: Tailstock back as far as it will go into an area where the frosting is still visible on the ways. Indicator was set as close to vertical as I could eyeball in the flat area between the tailstock vee way and the back saddle vee way. Wiped area clean with cloth before beginning. Initially had a slight problem with the indicator sliding sideways as I moved the ram in and out leading to continous changing values. I took a rubber mallet gave the end of the rod a slight (I do mean slight) rap to seat a little better, tightened up the chuck and the various "knuckles" on the mag base rods. Retried. Set indicator so that it had 220 thousands inset, zeroed it with the dial face, then ran the ram from all the way in (until I felt it starting to tighten up and pusht the chuck out) to all the way out until ram came offf screw. End result was less then half a thousandths in movement and it followed a straight path (as best as I could eyeball). Thus it would appear that the tailstock is most likely flat on the bottom and not tilted forward.