With the scroll saw able to tilt in either direction, it's not hard to cut the pins - mark where they go, tilt the saw one way and cut one side of each pin, then tilt the other way to cut the other side. Use the cut Pins to mark the 2nd board for Tails.
Dovetails are neat to look at, but with modern glue, the box joint is as strong as the dovetail and easier to cut (it's all square).