Board Thread:Questions and Answers/@comment-27668587-20160124161555/@comment-26828130-20160125012020

You should be aware of every use of materials, unless it's tax for loco's (gold/fuel/uranium) Plastic and carbon aren't used by loco's, but lower level players might get low on these materials because the bigger wagons to ship in those materials are pretty rare to get

If you are a level 90+ player, watch the SO/VO for those wagons If not, use your biggest plastic/carbon wagons on local tracks, and let contractors/achievements that need these materials rest for now