I bought an August smart lock and the included adaptors did not fit my lock. I created a new adapter to fit it. I am also posting the STEP file so you can easily modify it to fit your own doors.

If you print this adapter as is, it is known to fit Defiant brand deadbolts.

Modify it all you want, modify, but don't sell this. If you do share this or a modified version, please cite your original source.