Hi Folks, thank you all for your comments.
Danny I cut them using my Makita 10" chop saw with a newly sharpened blade on. The big downside was the 3mm kerf of the saw meant I lost too much of the material on each cut. I have tried to get a thinner blade but they are very expensive. I bought a cheap bench top bandsaw but I am having trouble getting it accurate.
Scott, they are about 1/8th"
Eric...