Glad to see you people listened to me.
I actaully think the best explanation is that we were all very, very bored or busy with other things.
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After hugo explained himself, Eric apologized for thinking he was a spy of some kind and dug out an extra room for extra-large patients, leaving natural-stone surgery table and storage cabinets for Gizogin's supplies.
Unfortunately, his concerns about invaders weren't unjustified in the least - the goblins had simply wandered in through the completely unguarded entrance. If MrHappyface was making more cyborgs of the migrants, they ought to be posted on guard 24/7. This place needed some serious defences and a military, soon, or gods-know-what might wander in and finish them off.
He went back to the new dorms, having converted the older, smaller rooms into bunkhouses for migrants before they'd set up proper rooms [make a note of that Zanzetkuken - Need a hundred or more new 5x5 rooms somewhere, use the old rooms as public dorms for homeless migrants.] and began contemplating a plan - a great citadel of cast-obsidian, 51 tiles square, and however tall it could possibly be and remain safe - 15 was good, but it would be stable at 50. He then had to find enough migrants to assign masonry duty - 50 out of the 150 or so that had arrived should do it. Finally, they needed pump stacks to deliver magma and water to the site. Easy enough, he thought, and began searching for a suitable locale for the stacks immediately. The citadel could be centered around the current entrance, and extra perimeter walls could be built outside of that. A very big project indeed, but with a workforce of 50-60 full-time workers with the rest of the population pitching in when not performing their other duties, it could very well be done in under a year. Casting the obsidian would be fast enough, after retaining walls were built and fluids diverted to the top of it.
If the structure were staffed with Mrhappyfaces' cyborgs, regardless of the current political clout surrounding them, and bristling with ballistae and various other weaponry, it would be a nigh-impenetrable fortress that not even an adamantine titan that spit fire like a river of death could tackle without a 100-year siege, and The Twelfth Bay of Games would finally be safe.
[Zanzetkuken, you don't necessarily have to update the map to include this citadel, I can wip up a SPEED:0 equivalent in a couple days. a 51x51xY cast-obsidian structure is a decent megaproject.]
[Hmm... It appears Mrhappyface isn't long for this world. All the scheming about cyborgs aside, we could still staff it with either normal dwarves or a mixture of normal dwarves and some automations from Gizogin...]