Paddy,
Thanks. I had one with the heavy aluminum base and 3rd hand. I sold mine and wish I hadn't.
The only thing I didn't like is that there was no bushing or bearing system at the post, so there was a tiny bit of play unless you locked it in.
Loved the jaws.
Mine was before he sold the vise system out. In fact, my instruction booklet which came with the vise had photos of an HMH instead of his AK vise. Guess he did the instructional booklet before his vise was available. Sorta funny, I thought.