Jim, a good idea
I tried something similar,
Tarawa list of info To try and plan out topics and set them up to be used would be quite a bit of work.
Specific areas like M4 would cover so much info that you would still have to scroll through tons of pages to get where you want to go.
Reference materials seem to mostly come in “The Battle of” or “DAK Armor”. It would seem that a time frame and geographical area would be best suited to this. For example France WWII or Italy WWII, or Saipan, This would cover everything in that area. Most searches start with that in mind, then specific sides, like allied or axis, then maybe further into specific vehicles. Exactly like a normal data base would progress to the exact thing that was being researched. The ending drop down or tree would end at the given topic.
This would be the logical way if you want to set one up. The example of the airplane thingy is more of an accident then anything else. A bunch of people exchanging ideas and references over something they care a lot about. I can see someone running across this post and liking the topic take an hour or so to scroll through 15 pages of information and maybe adding their ideas or references or just take what info they needed or were looking for and moving on.
I noticed that you have to go to Aeroscale, then Forums, then World War II, to be able to see the pinned P-47 thread. So finding the topic easily is a problem in itself
I also saw a lot of red X’s. You might also want to set up a gallery album for the photos to go so you won’t lose them, kind of like becoming the property of Armorama for reference available to all.
One large undertaking, might be easier to just re-name posts so that they could be searched for much easier and let the searcher determine what is important or not. I have noticed how a topic of “Dio plan criticism needed” really had to do with a King Tiger and the Battle of the Bulge.
Or just let the separate groups involved with their favorite topic create their own SIG and submit it for pin ability, you never know what item would take off or another show little concern.
No matter which way you go it will take a lot of time and effort and I wish you the best of luck,
Bob