Iain,
Has your cover got just a mast hole or does it have a fordeck centre join from the bow/forstay.
For the life of me I do not see any use with this kind of flat trailing cover,one must need shroud cutouts ?
If you can I would change it for a flat,trailing with cutouts cover or have shroud cutouts put into it.
C P 🙂
Ps, if you use fast pins,put a string on them so not to loose them!!