Here's an example showing a CLACK550 module with a fork, with the new 15mm margin. Technically the straight is out of spec as it's 0.1mm short of flush. I'm optimistic it will work in practice as even the CLACK300 module has a longer overhang.

And there - here's a side-by-side of the OG CLACK300 design and the final version. As I said, I'll be putting glue down now I have the "dual-mode" track here - so this will become the official standard for interconnects! :)