Basicly you are going to cut a groove into a flat nock and then round it down. That will work, and if you have the tools its not an issue. Ours are built like a true moon nock so there is more "groove" to seat the string. Considering plasic works OK on most bows the material of the aluminum is not much of an issue These particular photos show our original nock and the new ones we now make that are tapered so they load better. Also note the indexing mark on the new ones...

Wyvern