John, could you stick a manufacturer name to the polyfoam term. It seems that polyfoam in Google is like looking for 'Polygon' and trying to find Zbrush...
How fast is the Thermwood moving? Our self build with the 200KRpm air spindle has not been measured yet as we are still tweaking it. But it already makes kung fu swooosh noises while flying through EPS haha. And it's faster than I can press an e-stop button. We hope that our 2ft Z-axis are enough for slicing and dicing.