Audio Craft AC-4400 and related AC tonearms


I have so many Audio Craft headshells that i start thinking about Audio Craft tonearms.
Something like the Audio Craft AC-4400 silver color with removable armwands.
Must be a high quality tonearm, Japanese classics. The problem is that i’ve never tried them.
Anyone can comment? Would be nice to read more opinions.

Here is a picture of the AC-4400: https://i.ebayimg.com/images/g/oNcAAOSw0HVWADXg/s-l1600.jpg

There is also AC-3300 model: https://www.vinylengine.com/library/audiocraft-ultracraft/ac-3300.shtml

128x128chakster
They're unipivot. You want to mess with that? These are the tonearms that Graham fraudulently ripped off.
But what's the difference between AC-3000 vs. AC3300 and AC-4000 vs. 4400 ? This is where i'm lost.