Talk:P3Steel Bill of materials
The Bill of Materials page duplicates some information found on the Vitamins and Proteins pages, and these in turn are more complete.
I recommend reading all three pages (actually I recommend reading all the pages) before getting started on purchasing the parts or a kit for the P3Steel.
Particularly for the Proteins (i.e. the printed parts), there is a variety of choices to be made and I found that slightly disorienting when I began putting together the parts for my first P3Steel. The consequence was that I wasted almost two months getting some parts that were not necessary and / or delayed getting parts that were essential at the early stages of the build. Oh well, live and learn...