About this 3D model

This right-angle square guide clamps right into the t-tracks under the rails. I've also added an adjustable stop block on the top to prevent tipping. For the clamps, I'm using the Kreg Tool KMA7520 Track Clamps: https://amzn.to/49SCSM9 To attach the stop block, I'm using an m3 screw with a nut: https://amzn.to/4a1IbZy and washer: https://amzn.to/3N7xzyF