Mac asked about the thumbscrew that holds the sliding window/door in place
Mac, I found that it's possible to crack Plexiglas using those thumb screws, if you tighten them enough. A short shoe lace worked for me. I threaded it between the left and right latch pieces between the windows - then I tied a regular shoe-lace bow. This allowed me to have an opening from an inch or so (as small as you want) up to about eight inches of gap. The bow could be pulled loose in an instant. Four to eight inches is enough of a gap to let out a LOT of air and it does so in the low pressure area at the top of the canopy if you have a "flat" windshield. (I don't know how low the pressure is on bubble windshield Coupes.) This lets the ram air of the cabin vent push a LOT of air through the cabin. At any flying airspeed, I didn't need to have the windows down to get all the fresh cabin air I wanted. In addition, with the windows mostly up like that, there's no buffeting inside the cabin. On a long cross country, I found that the buffeting from flying with the windows down was extra tiring. The shoe string was a non-elegant but effective way to hold the window gap open with no stress on the plastic. Ed
