While my red and silver, Peter Pepper track saw positioning jig was posted in a spirit of fun, it is a serious jig and very easy to make. One thing I see is that the stop blocks really needs to be fairly long (12 inches or so, so they will hold the jig 90 to the outside edge. Setting the little positioning block on the stop block precisely will assure that whenever the stop block is clamped on, the jig will be square and accurate.
I always enjoy working out jigs like this.
The more I do, the less I accomplish.