Hi,<br><br>Here is a view of my plane under construction http://dkoelzer.murkworks.com/canopy/canclosed.jpg<br><br>The forward windscreen is make from Lexan while the bubble canopy is Plexiglas. In the above picture the forward part of the windscreen still has the white plastic covering on the Lexan. Here is another view with the hinged part of the Plexiglas canopy opened. http://dkoelzer.murkworks.com/canopy/canopen2.jpg<br><br>You can see that the metal hoop of the windscreen and turtle deck of the aft fuselage will act as roll bars so I won't be pinned under the overturned fuselage. I should have 2' of space to crawl out from under if I can make a hole in the canopy. <br><br>I inadvertently cracked my first Plexiglas canopy during installation and it surprised me how brittle Plexiglas really is. So score and crack method seems theoretically possible to me but I would feel better if I knew someone had first hand experience.