I'm building a science project with my little sister, and we quite frankly need some helpThe plan is to make a little rollercoaster out of plastic tubing as the trackIt's kind of thick, so it doesn't bend very wellWe've been straightening it out for a couple days, but it's still slightly wavyWe need to get it into a solid positionThe plan is to support it on some boxes, and maybe tape it down so it holds it's form.But, there is a part in the rollercoaster where it needs to be extremely straightAny ideas??