Thanks Steve. The Cabriolet has an integrated zip which should make the process a little more straightforward, although I’ve heard that lining up the teeth of the zip can be a nightmare!
The replacement window comes with an adhesive strip, but I’m also doing to use a speedy stitche awl to use the original stitching holes to re sew it too.
For extra measure I may also use a sealant on the zip teeth themselves too.
Leave it with me and I’ll try and document the process.