I have the same problem with my 31, some where on the ford barn I read where if u had the original cones, not the after market the window would stay open. I have been thinking on a solution for some time and I plan on making some kind of set up to hold the window open this winter when I put my car away, If I come up with an Idea that works and looks good I will surley post when that day come, if anyone else comes up with a solutuon or Idea please post for all us roadster guys,,,Thanks in advance!