This project was… difficult. But I learned a lot from it. I don’t think sharing the file with you would do you much good as the parts as they came off the CNC were not exactly assembly ready… lots of sanding and modification to get it to work. This was the second attempt at this box, the first one I scrapped completely. I’ll share with you the things I learned and you can give it a try.
The heart shape I made using this tutorial from @eciramella Draw a basic heart
Tink was just an image I pulled off the net, used a 30deg bit to trace on the line to a depth of 1/16"
It’s very important for getting the layers to fit together than your stock be absolutely flat, so I had to level both sides.
I used 3/16" dowel in locator holes to keep it all together
I use the tape/CA glue method for holding most projects down. I learned that doesn’t work well when the shape you’re cutting out is only 3/8" wide. Future projects I’ll use tabs to keep it all in place.
My original design 0.375" walls, and I figured using 0.17" offsets for the lip would be enough. Not so much. A lot of sanding was needed to get it to fit together. 0.035" was clearly not enough space to allow it to fit. For future projects I would probably go as much as 0.1 offsets instead. A square lid probably wouldn’t need as much of a lip, but where this is a curved shape I think you need to allow for much more room.
When you test fit it all together, there will be differences between the layers. Those are fixed with simple sanding. Do that AFTER you glue it together. I did it before, and it was perfect… after I glued it I had to sand again, and there’s not much room for error. If you look close at the bottom point of the heart, you can see the alignment dowel showing through because I had to sand it so much.
Let me know if you want the Aspire file for this… but I honestly think you’ll be better off starting from scratch using some of the tips above.