UPDATE: I figured it out. Waste board was not square with the frame which naturally would mess with a straight cut.
I’m carving a straight channel Y-17", X-.22", Z-.47".
Problem is the “Y”. It goes off course from the center line over the length of the 17" by 1/8"
I don’t see any issues with the design. I’m using Easel to choose the speed and feed. Any thoughts?
I also made 4 locating holes so I could flip the project to carve the other side. They moved in the same direction as well.
The whole project shifted west when heading north.