you've started to make a monster... I hope you know what you're in for here brother. So far, real good and looking forward to the next part. This build is going to be epic!!
Hello. This is high density Polyurethane foam. Around 1200-1500kg per cubic meter. This is used to test CNC program, with cheaper material and less risk for the machine. I managed to get some left over from a local machinist.