Thanks for the comments. I am learning how to use a swivel knife on the fly. I have found out that my blade is cheap and dull. I have ordered a new blade and a die to cut the shield out. That will make them symmetrical. This is a fun and humbling project. I am realizing how hard tooling is and how bad I am at it! Hopefully I will figure it out soon and then I can start making real shields instead on having a pile of practice pieces.