So far as I know, I don't need any. The post was mostly for Tam's benefit. I'm a severe technogeek who has been obsessed with all the things there are to be done and all ways there are to do them since childhood. And have a 5000 volume technical library to help me remember the things I forget.
A lot of people tend to assume that injection molding plastic takes huge expensive machines. While that is true of high volume production, at low volumes it becomes much simpler and building a machine and molds is a hobby shop level project.
