How do I aim a V-2?

Bosstrain…I say this humbly, but I think you’re a bit out of your depth in this discussion.

a bit?

IIRC, the V2 was actually called a “flying gas main” in England. They came in from above ballistically supersonic (as opposed to the noisy V2 flying in horizontally) so gave no warning they were coming until there was a loud explosion. The first few, the home office said were simply gas main explosions, until there were enough that people started calling them flying gas mains.

George Orwell apparently has a story or remniscence about going out to Hampstead on the hill north of London. They would sit in lawn chairs and watch the skyline for noisy V1 buzz bombs come in from the south, then wait for the explosion on the skyline not long after the buzz stopped.