Bow,
Remember that you can move metal with a ball pien hammer and a little judicious hammering. The word "smith" comes from the old English word "smite" - to hit.
Mark on the back of the part where it does not fill the inlet with a Sharpie pen. Flip the part over, place it on an anvil like hard maple end grain and use the ball pein head of your hammer (a small one) to move the metal laterally in the direction to fill the gap. A good smith can close up a 1/16th inch gap easily and quickly this way. Is it as good as making a nice tight inlet - NO! But sometimes $#@* happens. A little skill with a piening hammer can fill in those little gaps. Make sure that you anneal the metal frequently to prevent cracks.
At the fair, I have been demonstrating this for the past couple of years but I can't attend this year. But those gaps you have can all be filled by just nudging the metal over.
Best Regards,
John Cholin