Home made Moxon type vise

I have always wanted one of these vises. Firstly because they are inexpensive, and secondly because they are portable.
It all started when I saw the tap and die for sale through Garrett Wade for about $ 51.00
After that it was gluing up some scrap 1/2" baltic birch in 3 layers. Cutting some threads in 1 1/4" dowels and tapping 2 holes in the back piece and glue and screw in the threaded dowel. The horizontal clamping piece is made from oak.
The nuts are dimensioned after a 2×4. I thought that they would be too small, but the gripping power is just awesome.
There is no metal in this thing at all.