I don't think the city plan requires full defense to upgrade when on low involvement, so I'm not sure it really matters if it is under-defended.
OK, I wasn't sure how that worked, I have been looking at the defense bar which was way down.
I guess it would still mean the settlement would be prone to attacks, (and I like to try and balance the build so that it looks after its self)
Are you replacing power poles on plots? By not being connected you mean when you replace them, the original connections to them are lost, or that you are reconnecting them, but it doesn't seem to work when you export?
I got a couple of the wires to appear by going through each level and setpos/setangle on the offending object to ensure they weren't moved.
(this means when I have upgraded from level 2 to level 3 wires that were in the layout export don't show up).
I still have power lines not appearing between the Ornate street lamps I added (replacing the telephone poles from level 2) and the telephone poles - in some places. But some have made connections?
The new lamps connect to each other, its just between the new and old.
The other two are powered power conductors from WRK, I might see if I can rework and keep the same position and amount of power used in level 2.
I drew the missing lines in pink
Now some of those ornate lamps were placed through the customize plot option, so will replace them with new lamps from SS2 workshop menu - although checking they are all the same base ID.
BUT after checking I need to do some more re-working - a cage light that I remove in level 3 breaks the power grid, as well as two plots - which weren't happening previously. (oops... I had setpos one of the plots to move it slightly in level 2 and 3, but had missed doing that in level 1 - the city plan probably saw it as a deleted plot, which is what will be the problem with the other plot).
I am seriously hating anything to do with power, it's like if you move or remove things in higher city plan levels, you are gambling on them becoming INVALID FORM and breaking the power grid.
Edit with results:
Well plot power grid issues was easy to fix
Still missing 5 power lines in latest test
I just have no idea how to fix, so as my next stab in the dark I might figure out new postions of power poles, place in a blank croup to export, then import to each level, and put in new ornate lamps for level 3 and retest once again.