I was able to spend a couple of hours making a new front window for ‘Minnow’s’ cabin trunk. The old one made a perfect template. To prevent the Perspex splintering when using a jigsaw I placed it between pieces of plywood, and the shape was drawn on the upper piece.
When the Perspex was cut out I removed the upper piece and replaced it with the old window for ascertaining where to drill holes for the bolts. All went well without burring edges or splitting the Perspex.
Finally, I shall make as perfect a fit as possible within the mount, so as not to cause uneven tension on the Perspex when tightening the bolts. I have a feeling that is what caused the previous window to crack in so many places.