Hi Logan
G James glass here in Brisbane. They have a water jet cutter. I've ordered it and paid but they are taking their time. I cancelled that 1st order for the 8" blank due to a personal problem. All go now. I pulled the fixed post turntable apart last thursday and finished it today, I felt bad that it was as rough as guts and somebody suggested all our work should be the best we can do.
I also made up a number of concrete tools, I think casting plaster will be too soft for the machine,besides I wont need extra weight.