I don’t have room for a jointer so am trying to get a perfect edge for glueups using my contractor saw and a crosscut sled. 

Gives me a great edge with pine and redwood. I move to cherry and it’s not a straight edge. The middle of the edge always bows out slightly. Is this a blade issue? Is there anthing I can do diffrently?

I have also tried routing a perfect edgewith a router and a perfect guide. Same issue.

Any ideas what I can do to get the edge right — before I’m down to cherry toothpicks?