If we can do B, A doesn't provide many benefits.
A 1km diameter, 30km cylinder would provide enough area to feed ~140k people. 95km^2 of space.
That is assuming no imported food etc, based on 7000m^2 per person which is almost 2 acres each.
140k people is a small city.
While that is an interesting take, it is possible to do both!
Moldering: "to crumble into dust, to rot"
All the definitions of molding I can find, are about shaping something.
Literally nothing.
Give him a high five and tell him to keep doing what he is doing. Since we invent the time machine, I wouldn't want to fuck that up. Really I wouldn't even visit.
I would however be expecting a visit from my future self, to get the details on how to solve global warming and a bunch of other issues.
Colour would like a word with you.
Wouldn't that be mouldering?
Lathes are serious machines. They require serious caution!
At my previous job, there was a very lucky apprentice; he was working on "the small lathe"; the sleeve on his overalls caught on the work piece. His arm was pulled into the machine the overall sleeve tore as it was being pulled in. He got very nasty friction burns all up the under side of his arm; if the sleeve didn't tear, at minimum he would have lost the arm.....the lathe didn't stop spinning during the event. He panicked (understandably) and didn't think to hit the e-stop.
Table saws and lathes....don't fuck around with them. Powerful tools require serious caution; but they are also very useful when used correctly.
But do they have to set jumpers on the motherboard to choose the processor voltage?
That is really cool.
Legend.
Always found that strangely motivating.
You can probably trim that down by one.
But I would also add:
This feeds back into the first point.
You could have most people in a relatively small area with the rest for farming.
There would be little need for the equivalent of roads, almost all travel would be walk or bike. The longest distance between two points is less than 34km. If the main settlement is in a ring around the middle of the cylinder, it is less than 17km to any point.