I see your broader point. I updated the node (before your reply) with the following sentence, I should have used an UPDATE tag but was hoping I was fast enough:

"On further consideration, I would probably cut it down as you suggest, and deal with any 'why did you do this questions as they come up (instead of preempting them).

That'll teach me to try and outrun other monks ;->

UPDATE: In reality, I might not have rid myself of tempdir, the cut-down version you posted had it in there after all! But I do see your point.