I haven't seen screws come in from the side before. I'm not sure what purpose it would serve.
An edge lap toerail is for deck to hull joints where the deck sits on top of a hull shelf and then bolts them together with the 4" spacing.
If it's a wood deck.........
I thought Cascade was a glass hull? Why would they want to put screws in between the deck laminate.
Need more input...............
Are the new tracks bronze, by any chance?