So I did a front and back mold this time. It's was a little tricky but worked out very well. The biggest problem was getting the putty out of the mold without screwing up the press. To get it right I had to mold it once, pull off the back, pull it out of the front which minorly deshaped the back and repress it. It pulls out fine the second time. Bake and here's the result. When it cools, I just have to sand down the edges.