Here’s how I do it in AD…
Draw a heart and a circle for the bale (ignore the hole in the bale for now). Make sure they are both filled, but do not have a stroke assigned ):
Select both objects (cmd-a), then select Layer|Geometry|Add. You’ll now have a single object with a single smooth outline:
Set fill to “none” and give the stroke a color and set stroke width somewhere around 1 pt (it really doesn’t matter):
Add a circle for the hole, then select both the heart and the hole (cmd-a), then select Layer|Geometry|Combine. The two objects combine into a single object. You can deselect it, then re-select and change the stroke color to verify they are really one object:
Note that there’s now just a single “curves” object listed in the Layers inspector.
Now you can add whatever engraving(s) you desire (be sure to use a different color)…
Export as SVG (with the recommended options for GF) and you’re ready to go.
NB: There are multiple ways to accomplish this in AD. Other’s may have different/better advice, but this has always worked for me.