Made two mistakes, I used my top plate material while cutting the sides, and also left on the film which burned great in the laser cutter. Lots of residue and didn't want to deal with it.
Recut the sides, and taped the next piece for the top.
Ended up with gloss white acrylic top, instead of the matte white with black core. Ran a black sharpie over the rasters and then wiped the gloss with acetone wipes.