I'm looking for either SS or Delrin end caps that i can slap onto some poly tubing to make tanks. I saw the sink washers, but i want something that looks a little more professional. I looked at bigdaddyvapor but i don't feel like paying more for endcaps than i can buy an entire MAP tank for. Trying to keep costs down. If you guys can give me some instructions to build these without a lathe, or where to buy them, yu'd make my day. Thanks all.