Cutter used: .020” https://bitsbits.com/index.php?main_page=product_info&cPath=138_1_14&products_id=80 Time: ~43 minutes DPP: .002” Feedrate: 4” Plungerate: 1.225” RPM: 10,000 If you need something a little smaller a .015” will work with the same settings and will cut out the little hole in the cursive o. https://bitsbits.com/index.php?main_page=product_info&cPath=138_1_14&products_id=336 When cutting these parts I place a small amount of cutting fluid on the surface and wipe off as needed. Making a small pool using modeling clay for walls is also a great option. Cutting fluid used: https://www.precisebits.com/products/chemicals/cutting_oil.asp