Woodworking Aid: Platform Saddle for 2X4

I saw these saddles for dimensioned lumber in the latest Veritas catalog:

http://www.leevalley.com/us/wood/page.aspx?p=75861&cat=1,41637

I decided to make some for myself. With a set of these saddles, you can use cheap lumber as a sacrificial surface for breaking down sheet stock, for example. I haven't yet used it for actual work, so proceed at your own risk!

The post fits snugly in a 3/4" bench dog hole. A little sanding makes them easier to insert and remove. I used the following scr