Nice job !!
I'd be interested in knowing your steps for indexing the second side !!
On my table I have a Datum Bar that runs the full length along the X axis and stands 3mm higher than the bed surface.
I first cut the blank to the exact size as I had specified in c3d. Placed the material lined up with 0,0 and put the white material behind as an additional datum point so I could not push the blank any further up the X axis. ( Hope that made sense?)
For the second side I just flipped the piece over in the Y direction.
I will not be doing it this way again. Being a small piece, with not much material left around the outer edges, it was pretty difficult to hold down.
The only critical dimension is in the "Y". The "X" can be as long as you like. Then cut off the waste after machining both sides. (Gives more room for fixing securely.)
If you look closely at the base of the Rooster in the "One longer piece is better .jpg." You can see a small step. My datum bar is obviously out of possition. Must now do something about that.