I was waiting for someone to comment on not having the support bars in.
The wind pressure against the windshield would only press to a point, and slowly distort the sheetmetal at the hinges. Off roading, or bumpy roads would vibrate the the frame to the point that sheetmetal would eventfully tear....( think of it as a post in the ground, and someone comes along and starts pushing and pulling on it, either the foundation loosens or the post begins to break). Those out there with the early side door windows ( with sharp corners) witness this from the sheetmetal tearing at the corners from the door tops vibrating.
Your windshield rest look very nice, but do you secure the front edge of the frame down? The original tiedowns are spring loaded and actually clamp around the frame, again, holding it rigid. I know on at least one person on this list that his windshield bounced out of the frame while it was down, and another one years ago that the windshield popped out while crossing a stream at speed and hit a submerged tree trunk.... the Pinz stopped, the windshield didn't.

I've been asked 'how hard was it to remove a windshied?' I simply reached in though the door and pushed it out.

( For those older members, I don't use my forklift for everything

).
And on your openner... you knew those holes in bumper were to put a screwdriver through to remove the headlamp bezel?
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The Trojan Horse... the 1st Pinz used to covertly carry troops into battle .
ATL Pinzgauer XM 718K TUM(HD) 6x6 FFR (aka The Green Grail)