I'll pass that on to Andy as we were planning on making it out of a solid block of what ever type of metal our example is, but my non engineering mind thought why is this ejector so elaborate when all it does is knock a 22cal casing out, wouldn't a simple rectangle post do the same thing? The great thing about this project is we are not talking 30 cal and high pressure here so we rest at ease on the safety part of said project. Thanks again Peter and all the best to you and yours this holiday season.