We are going to build a couple permanent hunting blinds this off season. What I need is some ideas for sliding windows. With the way were building our blinds, We would like a vertical sliding lexan window. Looking for ideas for a window track. I have seen blinds at show that had a vert window setup that used a aluminum z type bar to hold the windows in place but I cant find anything like it anywhere. Thanks for any ideas. Were done with pop ups, Lost 2 more this year from the snow caving them in.