To anyone who hasn't read the thread in project announcements regarding the $15 sawboard, go read it now.
The sawboard has quickly become one of my favorite tools, but I've had bad experiences with it. I have a tendency to let the saw pull away from the fence and ruin the board. A stupid mistake, I know, but still one that I make. So, it was either create a solution or buy one for $50 to $100. Or course, I built one. I've not seen anyone else add something like this, so it is my own design.
This version of the sawboard is not quite as easy to make as the original one; it is not something you can make on a job site and throw away at the end. It does give a good cut though and retains the sawboard's key feature of being able to line-up the cut to the board's edge.
I won't go into too much detail on how I actually built it, since it is not that much different than the original. The pictures and drawing should be enough to give you an idea.
The sled could have been made much easier if my saw shoe had bolt holes in it. Since it didn't, I just surrounded it with the angle aluminum.
BTW, I know there are several, easier ways to accomplish the same thing. One thing that can be done is to make the board wide enough that you can add a fence to the other side. I didn't like this idea though since it wouldn't be quite as easy to line up the cut with board on both sides.