Finished the trim. I cut each top/bottom piece at a 45 degree angle.

s8 - 25x25x12 Cube Build

IMG 8732 - 25x25x12 Cube Build

IMG 8733 - 25x25x12 Cube Build

Can't get much closer than this
s10 - 25x25x12 Cube Build

Now it's off to the store to get something to sink the nails with and then I'll start putting on the wood putty and finally the stain/poly.