What is the effective length of Basis Vector 4?

Can someone tell me what is the effective length of the Basis Vector 4 tonearm (the tonarm pivot to the turntable spindle)? I'm trying to mount one on an old Clearaudio Master Reference turntable and desperately needed the tonearm's measurement which surprisingly cannot be found anywhere on the web?! Thanks in advance for anyone who can advise me on this vital piece of information.