So, I got this idea in my head. I wanted to build the UNSC base from Halo Wars, but decided it would be too much effort. I still wanted a modular base, though and realized something. Train tracks and lego racers track (both straight) are 8 x 16 studs. Baseplates' edges are multiples of eight. How could I incorperate these together? Simple. Also, I have an abundance of red bricks. By the way, this uses multicolored pieces at a few ppints, but it doesn't matter because you wouldn't see them otherwise.
This is the far corner. This setup of the base is 80 x 144 studs. Pretty huge. I don't know how tall the radar tower is, but probably about a foot.
These are all the baseplates. All of them can connect in some way, shape, or form. The train track connects to other train track, and the highway connects to itself as well. The large red building can be placed anywhere. I wanted to make this set on a savannah or grassland of sorts, but didn't want the whole base to be grass. Instead, some is grey, implying the prescence of metal or concrete or it's a bridge over a pit of nothingness. Kinda like the ones in Mario. Seriously, why would you put lava or endless pits of death in a castle? Isn't that some sort of occupational hazard? Anyway, this isn't the only way Red Base is modular...
The buildings are also modular. The big grey tower and red building are "A" buildings that have "A" sockets on them for "B" building segments. "B" building segments and the smaller outposts on the baseplates have "B" sockets, and fit "C" attachments: things such as the dual .50 caliber machine guns (2x), a HIVE missile battery, radar dish, crane, and observation tower.
Demonstration of how to assemble: C over B over A.
Large red building. The command center.
Outpost Alpha. Has a "B" socket.
Outpost Bravo. Has a "B" socket.
Outpost charlie. Big surprie, has a "B" socket.
Outpost delta. Unlike the previous three, this is an "A" socket.
The three "A" socket inserts. All of them have a "B" socket on top for small inserts.
HIVE missile battery. Essentially, it's eight stinger missile launchers thrown together, and modified to be fed from hoppers. It's mostly automated.
Dual .50 cals. Extremely effective anti-air gun. The Browning .50 cal is still in use by militaries around the world, despite it being about 90 years old. That says something about how effective it is at it's job, amiright?
Observation tower. Is a "C" insert. Also a use for X-pods. I think using red instead of black would have looked better, but it doesn't matter that much.
Crane. Is a "C" insert. The hook extends and retracts.
Radar dish. Like the previous, is a "C" insert. Not surprising.
These are the train tracks and highway baseplates that have nothing elese on them. Included are the airfield and bridge.
Another way to make the base
A third way to make the base
The fourth and final way to make the base. Actually, only out of the setups featured here. There's probably hundreds more, however this setup is fairly limited due to the multiple sockets and inserts and use of combined track types. My newer blue base solves all of those problems.