How were the original window plugs stuck into the cars ?
Were they welded in or bolted in then the seam filled the same way the 1/4 s were to the roof ?
Stitch welded along the perimeter, then leaded in, filed smooth.
3-4 blob welds holding the inner to the original Dutchman.
These pics show the welds:
XX29L9B238084 (https://drive.google.com/drive/folders/0B0bLJQSAl22Efkg5aXlWN2VJaXJmWFp0TU9RYUhWdWNyaEVSa0o5U3dHVGJmWFgyS3dKQTA)
XX29J9B386551 (https://drive.google.com/drive/folders/0B0yiRxRtmJ_xcGdzY1FtSFY3UlE)