Got a PM with some good observations, so I am adding the following.
1. Material can be CRS or even Alum. as this is just a test plate to see if my hole locations are correct. I then plan to follow up with an order made from hardened tool steel.
2. The reason I requested drilled on CNC is because if it is initially done by CNC the supplier will have a cam file that can be used to generate a duplicate plate out of tool steel.
3. I am open to suggestions, this is a home project and I need to keep my cost down. The wife already thinks I am spending too much time and money on this.
4. Attached are drawings of all 4 plates
Can someone tell me how to attach a drawing file to a PM. response, I don't see any place for an attachment?