Yep - Universal 116 degree template, usually it comes in clear plastic.
For getting the height of 1/2" for the stones I have (didn't want to invest in Lindsey's) I just added 1/4 inch and thinner plastic sheets under the stones. Also, I mounted the resulting gravers in 1/4 inch dia. round aluminium handles, you'll want fairly thin handles on those, too thick and they interfere with your hand movement while tap tap tapping...
dave