Download the files (standard version 1.1).
View the instructions and complete specifications (web page).
For those who would like to install the Mobile Fortress along with the DDRS mod:
Download the files for integration with DDRS version 2.1 Note: Install DDRS as a patch. Install the Mobile Fortress as the selectable Mod. Future DDRS releases may not be compatable. You will still have to download and install the DDRS mod files if you choose this option.
Since this ship is too large to connect with equipment docks, or be produced by shipyards, it comes with most of the common upgrades pre-installed - including full weapons loadout.
Fly, and die no more

Ship specs:
Cargo capacity: 60,000
Docking 260 total: (236 x M5, M4), (5x M1, M2, TL), (20 x M6, TP, TS)
Hull strength: 400000
Reactor output power: 20000 MW
Maximum speed: 64.27
Acceleration: 1ms
Shields: 10GJ x 2
Weapons recharge rate: 2000 J/s
Weapons energy: 100000 J
Lasers: Gamma Photon Pulse Cannon or Lasertower weapon x 24.
Missiles: Typical M1 assortment
Cost: Priceless. If you have to ask, you can't afford one.
Images:
Emerging from a jump gate with 4 M1's docked in the rear:
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Fighter docking:
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Medium size docking port:
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In the thick of things:
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Cockpit view:
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