hey guys! so i got an older singer 301 for cheap off of CL a few weeks ago. starting to order things up to work on my first bag and just curious if you guys could help me out on all the crazy names for things, Ripstop, cords, types of cordura, xpac vs everything else, what zipper will work with what zipper pull, foam and all the other things that may be confusing to a rookie. thanks guys! just new to the whole thing and really antsy to get going on my first bag but need some education about all the products and what they actually do and how they stack up against others.