I used screw eyes for all my darters. All my other style plugs I thru-wire. I have found the grommets in a variety of sizes in fabric stores
(I think they use them for eye holes on jackets, etc.) As far as the angle to use on the darter; I used a gibbs darter to model the first one I made and after that I experimented to get different effects. The way I shape the darter is with a belt sander. I also have a mini lathe, but it doesn't help you with the flat in front!! Good luck and enjoy the new hobby!! If you have more questions, keep them coming. There are plenty of talented people on this board who can help you out.