So maybe I don't suck that much, then? Hahaha. I wonder how did they did this spine thing 500 years ago in Asia. Or the native Americans. Probably a much more frustrating amount of experimentation..
I was getting horrible "groups", maybe 45" wide with a ~25-30# bow, thumb draw. Arrow on right side, arrows going to the right, and nock right. I switched to a ~40# bow, same arrows, they were going straighter and my groups shrank. But still pretty big. Maybe 20-25". But there was one time where I had a pretty small group of 3 arrows and some fliers with the weak bow...
All of this at 18m(20yd).. still very far from pie plate accuracy :\