Very nicely done from scratch. From past experience, this is what I've found out about copper. I have made some blade blanks for the blade mold I have in copper. The copper finished blade bait has more vibration than brass, plated steel or stainless steel because copper is lighter. The only problem I did find was that I used soft copper and it had a tendency to bend easily and get nicked up, which then lost its ability to vibrate after repetitive use. So then I went to full hard copper. It then helped tremendously, but copper is still soft. Painting the copper blades with candy powder paints, polishing or sanding the blade gave some really nice visual effects. One last thing I found that really works well. 6061 T6 alloy aluminum. Aluminum is very light and this alloy is very hard. I had the profile cut on a laser, because you can not cut this aluminum with tin snips without distorting the shape. The vibration was very impressive Good luck on your design and let me know how it works.