(please excuse my English, I'm French)
I own an Akai and a Hitachi turntables. I aligned cartridges with Baerwald and with service manuals from Vinylengine, I found manufacturers simplified procedures.
For the Akai (AP-Q55 / S tonearm), it's an overhang of 15 mm. Manual says to use the centre of the platter with I made. Good sound, no distortion. I made a sign on the cartridge 15 mm behind the stylus. I use the original headshell.
For the Hitachi (HT-353 / S tonearm ), it's a overhang of 15 mm. If I use the Akai method, it's impossible to respect overhang. The best I can have is a 19 mm overhang. Manual says to set a distance of 51 mm (minimum I can set is 50 mm) between stylus and the base of the headshell to give me 20 mm of overhang if I put the cartridge on the centre of the platter.
How a 51 mm distance can fix a 15 mm of overhang ?
On the Hitachi, Baerwald setting gave my some distortions on older records when Akai plays them with a better sound with a manufacturer or Baerwald setting.
Thank a lot for explanations...