Silver Butterfly wing

I cast another butterfly wing but this time in silver (Fig.2). I attached the wing to the wax the same way I did the first casting (Fig.1) and it worked just as well as the first prototype. All the details came through in the silver but I still feel the piece is too thick for a butterfly wing. I am going to file it thinner but I want to get more wings to make a few more but using a thinner layer of wax. 

Figure 1- Bowes, K., (2020). Wing set in wax.

Figure 2- Bowes, K., (2020). The silver casting of the wing.