the Hobbed Bolt for the 3D Extruder showed up today. and because they could come at the same time I bought the SPRiNGS to help it along. a talented maker named Charles machined the bolt. he sells them on eBay for just SiX bucks. while could have made this part myself using a Dremel there is NO WAY I could have made it as well. or for as cheap. while I am all for the DiY there are times when using the power of community makes more sense. and in this case I am very happy with the end result.