The octopus cut-outs were the first things to get done as they were quick to cut compared to the 3d print. I used chipboard as I wanted something not too thick, smooth, and strong enough to hold keys. 

The stratasys continuous printer messed up the print 2 times but finally on the third try which took 9.5 hours, it was all ready to go. The dimensions were all perfect and I did not need to reprint!