[2020] quays, always a hole where the node is, between two quay pieces

This happens when they have a different width. Not the width of the actual model, but the width of the network (the blue outline you see). My quays for example have a different and smaller width than the default, so they will have a grab when connected to the default one. They all have the same width though, so all of mine connect nicely to each other.

If you want them to look connected, then the best way to do that is to not connect them at all. Then use Move It to drag the ends together.

Originally posted by grapplehoeker: Move It sure makes everything a lot easier, but it really hasn't been an issue for me and I've been laying quaywalls without a hitch since they were released and long before that mod was a twinkle in the modder's eye ;)

That's because it only happens when you start moving into the realm of custom quays, where the network width varies. ;)