Review on Eagle America 415 9307 4159307 Dovetail by Sean Young

Terrible design means you can't draw square lines and angled lines at the same time. So you should get a square and visually align the two lines. Improved markers allow you to draw a square across the fibers and then along the lines of the tail without moving the marker. Also, it is so small that it is unstable when marking half-pen. Almost useless and no better than a tilt sensor. I'll throw mine away and buy a good one.