Someone asked me how I found the settlement and what method I used. I'll repost it here so you can use it to find the others:
Be warned. The explanation is a bit girthy.
"First of all, I ascertain how many degrees 1,000km is because that's how far the station will render into your instance. To do this, I fly in normal space first at 100m/s and I judge it by how long it takes to cover 0.0010 degrees. On GLY E2 6 it took a second to cover that distance at 125ms. I was then able to ascertain that 1.0000 = 125km. 8.0000 or so = 1,000km, within accuracy of a degree or so.
Next comes the lengthy part. I started at 0,0, went into supercruise at 0 degrees and travelled until 5 degrees passed (675km or so) then I'd enter the glide. 5,0 10,0 15,0 and so on. I'd do a full lap of the planet doing this and then shift to 0,6, 5,6, etc. It gets a bit tricky because once it reaches 90,0, the bearing flips to 180 (-90,-180) so you have to keep that in mind.
As soon as I detect a longer loading time which is unmistakeably longer than the other hundred times you do it, I use that as my central point. I go up 2,000km (2mm)(this assures the station derenders from the instance) and I save and exit then quit the game (it's important you quit the game completely because it still holds data if you just save and exit).
Log back in, come back down but warp onto the planet at a different point but still on the same lat-long as when you discovered the load. For example, I detected a load on 20,12. I had previously checked 20,6 and no load occurred so I went the other way, 20,20 (8 degrees along, which is 1,000km on that planet). Did it again. 22, 24, 26, 27 all did it. 28 did not. 27.5 did though so I left that there.
Then did the same on the other side. 20,11 did it. 20,10.5 did it. 20,10 did not.
So now I have my width: 20,10.5 and 20,27.5. Because that is definitely around 2,000km (that's the total distance from end to end that the station will render into. Think of a sphere with the station in the middle) that meant the station had to be somewhere close to the middle of those two numbers on the same plane, which were 20,19. Instead of working out the other direction I started my search at 22,19 and flew down. And of course, it was there. I had accurately guessed where the site was within 1.0000 degree.
TL;DR:
1.Find out what speed covers 0.0010 in a single second. X that by 1000 to get how many km is one full degree. X that by how many times it goes into 1000. You now know how many degrees 1mm is.
2. Start at 0,0. SC and Glide in 500/800km chunks. This assures you'll come across it in one instance or another. Once a full lap is made, do it again but 500/800km to the side (from 0,0 to 0,10 for example).
3. Once load has been found, treat that as your epicenter. Tease the boundaries in 1 degree chunks (while staying on the same plane) to see how far once side goes until it stops then try the other side. If the difference between the two distances do not equal roughly 2mm, do the same with the other.
4. Find the middle point between all the numbers and your settlement should be within that sector."