Sorry Slim.
Guilty. I did that with my Sig. I didn't really think of myself as an amateur. I looked at that I was providing some costing for a buyer so they could see what it would cost them to assemble the same set-up.
I guess being in automotive OE sales influences my personal sales. In my line of sales I have to disclose by line item every cost. Materials, labor, profit, SG&A, tooling, etc.
Keep doing this.