I am beginning to learn the JOSM editor as it looks like all serious mappers end up there. Got to build the skillz to get better at this.

Gotcha. Is there an efficient way of "snapping" two ways/buildings together? I'm using the iD editor and manually moving traces to ensure they are adjacent but not overlapping is a bit laborious.

Thanks for pointing these out. I have manually recreated many of the ways to better reflect terraced buildings.