Hello, I am milling some 1/4" deep v grooves into some clear cast acrylic on my Shopbot PRS Alpha. I have been using an Onsrud 37-82 (60 degree bit) that came with the machine. It is working good, but the tip is chipped and I was going to get a new one. I looked up this bit and it says its for hardwood and plywood. It worked okay for the few tests I did, but now I have a large production to run and I was going to buy a new one. Is there any recommendations for 60degree v-bit specifically designed for cast acrylic or hard plastics? Onsrud does not seem to have any... Thanks!