Yeah no worries. I read that just as I was falling asleep, but I can probably bang it out this Wed.
I also want to make sure I understand exactly what you want though. The reason I was confused is because the Copenhagen TT is a separate island right? If so, having that TT control passage into sz 113 would make the tile impossible to reach for the Allies, since that's the sz that the island is contained within. Unless it has a connect to another tile by land or something like paratroopers that don't need a naval transport for the amphib. You'd have a similar issue going the other direction from 114, again cause of the island thing.
I think originally I thought Copenhagen/Juteland would be the same TT or with a land bridge to Juteland if separate, but probably got mixed up in the labelling. Another option if you really want to have both straits would be to modify Copenhagen so that it's not a true island, and make that visually obvious. Like I could add a bit off a border, to split off some of the Jutland tile or the Holstein tile and add it to the Copenhagen tile in the base, if that seems sensible?
Anyhow we'll dive in on it this week for sure!
ps. another option is to break sz 113 into A/B. I'd be among the smaller SZ tiles, but there are others about that size elsewhere so might not be too off the wall. Then you could have the new boundary between 113A and 113B at Kattegat if you wanted, which might be easier to parse for the visual. I imagine the most important passage is 112 into 113 (Allied approach), but I like the idea of a clap back from the Baltic, which I think is what you're after maybe? Like where the Allies could land at Juteland or push up the coast, but the Germans could still hold the strait into the Baltic proper, if they can hang onto the Copenhagen-Denmark tile. Might be a bit tight for the units though. Like maybe not for G, but for a combined US/Brit fleet there'd prob be some spillover. Tweaking the land tile might be simpler hehe.
I think the cleanest visual would just be to have the beacon closest to the relevant white line, and then a second dotted blue line along whichever SZ boundary is controlled.
For the actual canals, Suez/Panama, I was thinking to do something different though, because the lines there are shorter. Like maybe at the entrance do like a half circle in dotted blue?
Or in misc folder I saw Frostion had a bridge graphic that might work for something. Not sure though.

I think the beacons alone can be sorta easy to miss, I might punch up the chroma for the red, but hopefully the blue dots or something similar nearby would help highlight.
For the canals though, and the Dardanelles/Bosphorus zones, the area around those crossings is a little tighter than it is with the straits like Denmark and Gibraltar, so probably needs something to help it pop out more. Maybe carrying the dotted line across the land for the canals?
With a shape like )(
Or something like that for Suez/Panama.
I'll have to play around with it some more, I was just kinda riffing above heheh.
I tried to do a directional beam for the lighthouse earlier, but the light cone looked a little off heheh. Like it would seem ok, but then when I shrank it down it would just sorta lose the visual. There might be a plug in light effect that does it better, that I just don't know about. I'll look around and see if there's something I can pull.