Thanks! Learning that dovetails always have some gaps is the first step to mastering the joint. Believe me, there are repairs all over the place. Keep the offcuts of the material you're using and they disappear easily.
My dovetails aren't entirely hand cut either. I start by cutting the tails with a simple jig on the bandsaw. It's simply an angle cut that rides along the fence. This starts you off on the right foot since all of the tails are perfectly straight and perfectly square to the boards face. Sawing tails with a handsaw is not for me.
After the tails are cut, careful scribing with a knife shows you where you need to be and everything else falls into place.