Does help now of course but for the future, with advance tweakables on, would changing the autostrut options on other parts of the base help stabilize the structure? Say strut to grandparent/parent? Not sure myself but thought I'd throw it out there if you are thinking of magically repairing/replacing the station with a newly constructed one using the debug menu.
----> Cycle through active ships (forwards)
----> Cycle through active ships (backwards)
"Ships" include Kerbals that are close by to the active ship. The square bracket keys are to the right of the letter P on the keyboard (same on the Mac, yes?)
Hope that helps.
Not understanding what you are looking for then - technically, the moon is never "in plane" over the Cape but the inclination minimises over a period of 18.6 years, as you've said.. The optimum for that 'lunar month" would be the day around when the moon will pass the correct 'node' as everyone has described - "Baikonur-style" with two potential launch windows for that day - one generally much better than the other. which is reserved for "oops, missed the first one".
Astronomers already measure the time it takes the moon to complete a node-node orbit, incorporating the precision of nodes - the draconic/draconitic month = 27.2122 days. So your 'optimum' launch window comes every draconitic month since the last one +/- planets rotation to best launch angle for that day.
If you are simply looking for the month/year of minimum inclination, then it's just 18.61 years after the last minima. Oddly enough Apollo 11 launched in the year of maximum inclination - 1969. Maybe it was to get the best coverage of potential landing spots instead of being stuck at the equator (just speculating)
The last minima was October 2015 - so it was nearly in plane then and we could launch 'whenever' during the later half of 2015 which is another version of 'optimum' launch window.
More generally,the inclination is minimised when N = 180
N(T) = 259.16 - 1934.14T + 0.0021T2,
where T = the number of Julian centuries that have passed since midnight on 1 January 1900 at the Greenwich meridian.
Hope that answers your question.
The KSP wiki is your friend for many things, this included. The game uses meters instead of km, probably because all the equations and calcs need inputs in meters.
As for AU - that's an Earth-centric measure where the average distance of the Earth to the Sun (or Semi-Major Axis, SMA) = 1AU = 149597871km.
So Kerbin is 0.091AU out from its sun or 1KU (Kerbonautical Unit )
I'll leave the rest of the math to you but it is interesting to note that the system Kerbin is in approximates the relative distances of our own solar system. Jupiter = ~5.2 AU vs Jool = ~5.1KU