Senior Member
Got fair with one back in the 70's, then quit. Years ago, watched a documentary of some natives somewhere in the world. Noticed they threw overhand for distant game, and sideways for close running game. Guess sideways would take the overhead arch out of the toss.
One of my former students made a nice one a few years back and got pretty handy with it. There is a man here in Montana ( Belgrade) known as atlatl Bob. Check him out online.