I wanted to post a few simple mods I came up with that I think others would appreciate. Wouldn't mind seeing some other's good simple mods.
#1 - I have noticed on a lot of model IV's and earlier that the bottom of windshield pushes the cowling out at the front of the door and just plain looks shoddy. On the last/bottom mounting tab I put the windshield on the inside of the tab and it helps everything fit flush. Shown in first and second pictures.
#2 - I have a regular clear lexan windshield, but wanted the option of tint on top and to be able to go back and forth between the two. Film doesn't work well on lexan and shades can be hard to fit and don't look as nice. I put a thin backing strip of aluminum under the butt ribs and the center rib to create a shelf about 1/4 inch wide for a piece of tinted lexan to sit just underneath the clear roof lexan. The center butt rib is held on at each end with a screw and lock nut so it can drop down for easy install and removal of the tinted lexan. Shown in pics 3,4, and 5.