I probably subconsciously pushed those 4 lines out of my mind. Cutting lines that needed two cuts, especially ones close together, was a nightmare as it weakened the outer ply and it started splintering. I had sellotape and glue and bits of wood holding it all together.
The cut I missed is in the centre of the windscreen, a small vertical line. With the picture enlarged, you can see the drill hole as a grey dot.
Thanks for all the comments.
Martin.
