yeah. 10 cents. It is kind of like when I do my own auto repairs. I save hundreds of dollars over taking it into the shop. But that ignores the literally thousands of dollars of tools I have accumulated over the years (and the not insignificant amount of blood donated to various vehicles and soap used in cleaning up). The accounting does come out in my favor over all of the repairs that have been done and I know the quality of the work (both good and bad) so it works out, but it sure isn't for everyone.
On the other hand, it is really neat to have discovered this and to be able to do it. Good on you, Dave.