I have an idea of the city looking like a big H arrangements with minor components (usually sentry pods, rockets launchers, radar stuff, solar towers, lifts) attached to the main H shape
1) Shuttle landing bay area with a causeway leading from the left side front to the main city ( not so long just enough)
2) Main entrance with retractable bridge and closing security doors - the insecticons vs hotrod/kup scene
3) Main tower where UM and others look and survey the incoming enemies at the very top, below it could be the computer room - fits 4-5 deluxe bots and below are "generic floors" - with windows ( some with turrets) where Blurr is firing at the decepticons - about 2-3 levels with a workiing lift - kinda like that of the gobots doggie base, simple and no battery needed heheeh
4) 4 - 6 towers scattered in the H complex which "transform" into turrets, cannons and missle launchers interconnected by floating "highways" so that autobots can transform and roll around like a modern city should be hehehe
with platforms attacheable in various places for variations
5) a forward main cannon tower below the computer room on the main tower - above the main entrance - the one which devastator bitch slaps - "moves in for the kill"
6) Communication tower at the left wing where Blaster and the cassetrons bitchslaps each other heheheh- comes with clear plastic dome and big rotating radar dish with detacheable feature to simulate being broken by the cassetrons)
7) A repair bay/ invention room/laboratory at the right wing part of the complex so that ratchet/wheeljack and perceptor can fix their buddies and do some mad scientist stuff. about 2 - 3 beds, monitors, cranes and robotic repair arms and scanners big enough to fit an Ultra bot too.
8) a holding pen/cell for captured bots at the back part of the complex - could be separate from the main H complex connected with plates as a highway/walkway- the bars colud be clear yellow or blue to simulate energy laser bars as a feature.
9) plenty of standalone sentry blaster units with radar , missle launcher or laser cannon scattered around the base for perimeter defense.
Well that's it for now, Ill see if I can draw this ideas to make it more clearer heheheh

this project has me so excited!!
Wanted AM partner Vanguard, Myclones Dirge, G1 Victory Leo, e-hobby Dark scream ( the black version), e-hobby Magnificus
Parts- AM partner Basher-side guns, G1 Actionmaster Elite Windmill's blades[I][B]