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Yes, i can build it myself.
From raw sheet metals.

If i have to make the sheet metals, it will take longer.

My plans should last about 100 years.
The biggest pain in the butt is bearings, but i can always go back to babbitt.

Nice. I wish I could be as confident.

I'll be lucky to last a few months in Jericho.

I hope you have enough genetic diversity to last more than 2 generations.