I've called this batch generic wood because it's available from most places, left to right it's MDF, Poplar and Birch. Be wary of the Birch though, a good batch has the occasional knot in the middle layer a bad batch can be nearly impossible to cut. The additional tile is Illomba veneered poplar, it's a nice material and the poplar core means it cuts really well. I don't know who sells it at the moment but I have a stock pile left over from when Kitronik were accidentally sent a batch.
While the machine is turning these out I've started looking at the framework to hold them all together. Just one day left till the maker faire I have the feeling today is going to be a busy day.