We've tried that piano wire (and zip tie) method and the windshield always cracks. Best one we saw was what the windshield guy at Sharktoberfest used. He mounted a reciprocating saw with a large flat metal blade spatula (about 3 inches wide) and coated it with liquid soap...and shoved it under the glass from the inside..and started it up..it sort of "cut" the butyl bead... (soap kept it from resealing)...all the way round and then pushed the window out...
Any pressure from the inside usually cracks the glass...this method just cuts in and out...sliding under the glass...
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89GT
82 bodied/91 megasquirted engine/GTS flared/ track car/328rwhp 385ft-lbs.. in progress
"With the 928, Porsche built a lightsaber, only to discover that people still liked their switchblades."
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