This is my first jewelry project that make use of Rolland MDX-15 to engrave on wax to create the molds. The results was not as good as I have expected. I did not realize the taper effect create by the engraving knife until whole mold is finished craved. The rings surface had been thinned to a spoiled original Celtic design. Besides that wax substrates become sticky and clot in between the small gaps of the design. I have done both side engraving and try to solve the taper effect but still can't get the exact engrave point when the mold was flip over. At last I decide to use a really sharp engrave knife and engrave maximum depth of 15mm. It gives a better results. As conclusion, I prefer to use modeling board to run on such patterns mold.