LBD.... thanks. There's no reason my base needs to be as big as it is but it's comfortable. It may be better to have the dowel groove stop nearer the front edge to work on the pull and I can see this if it could be placed to hook over a workmate front edge. But because I'm doing it as described is the reason I made a locking groove to hold the dowel while making a pull cut. 
Good point though.