I looked through some old threads and didn't see what I was looking for. There are 3 materials out there Polyurethane, ABS, and Aluminum. I know the old school were aluminum but the window was different the new aluminum one looks like it leaves a big opening at the bottom.I like the looks of the other 2 except one looks like it's textured the other smooth which is what I want. So which material is stronger ABS or Polyurethane.Also keeping an open mind, for those that now own them what are your pros and cons? :notallthere: