Cruiser, that is a realy professional looking enclosure. Is the actual surround made of steel or wood? Also, couldn't you get by with using 1/8" acrylic instead of Lexan? Would be a lot less expense and if I remember correctly plexi is more resistent to abbrasion (wipping chips off) than Lexan. Of course plexi is not as impact resistent but of course chips have little mass. Some people simply use plastic sheeting
Maybe you had something else in mind to necessitate the Lexan though. Anyway, nice enclosure.