The SME V has a sliding base in order to provide for proper stylus overhang adjustment without the necessity of slotted headshell mounting holes. The SME V design philosophy is to have a completely rigid tonearm wand (which is also the reason the headshell cannot be rotated for azimuth adjustment.)
Supposedly, the SME V alignment templates provide for obtaining the proper stylus overhang, but I find them inexact (to say the least!) It's much easier to use a small thin metal millimeter scale placed carefully on the spindle with the other end supported on a rubber eraser or some such. Then with the anti-skating OFF, it's easy to set the stylus on the metal scale and rack the tonearm base back and forth to achieve precise stylus overhang right at the spindle.
After that it's relatively easy to use a DB or other protractor to adjust the cartridge parallel to the protractor gridlines at two points.
Supposedly, the SME V alignment templates provide for obtaining the proper stylus overhang, but I find them inexact (to say the least!) It's much easier to use a small thin metal millimeter scale placed carefully on the spindle with the other end supported on a rubber eraser or some such. Then with the anti-skating OFF, it's easy to set the stylus on the metal scale and rack the tonearm base back and forth to achieve precise stylus overhang right at the spindle.
After that it's relatively easy to use a DB or other protractor to adjust the cartridge parallel to the protractor gridlines at two points.