widespread availability of tools like those,

This is the real killer of the idea : assuming that everything else will be "the same", i.e. availability of bike parts, electric motors, 12v chain saws!!!

Another idiotic delusion (alas!)

I don't get into this post-peak survivalist speculation because a) I don't know anything and b) I think we'll adapt and carry on.

But anyways, post peak there will be a hundred million 1.5kW electric motors for the taking in the form of starter motors from cars with empty gas tanks. I also wonder how much need there will be for a state of the art semiconductor fab. Can't we just loot the nearest radioshack?