Hi Bernie,

I doubt it would crack a canopy. My fear (founded or unfounded) is that the
localized deformation of the canopy would lead to internal crazing -
especially in extremely hot or cold conditions.

I just wouldn't want to risk a $2000 to $5000 glider canopy.

Paul Remde

"Bernie" wrote in message
ups.com...
Has anyone ever seen a canopy cracked by a 'lever-action' suction
device? You've got me worried now ..........