Small Triangle Remaining

This small triangle is the only remaining empty space!!! Even in the wind and rain it was quite cosy in the GH, even though it leaked a bit at all four corners. I think I will use silicon sealant on the gaps. Is this a good idea? I cut the small piece of glass for the central door panel myself and am building up to this oddly shaped pane.
I am going to grow French beans in pots on the staging using capillary matting for watering. I am wondering about some tomatoes in rings and some in growbags to see which do best. I really must get pricking out at home and shifting things into the GH.