I had a look at this a couple of weeks ago and dismissed it as impossible. However coming back to it this week I quickly worked it out from the title and the clue. Odd how that happens isn't it.
I happened to be passing on Tuesday but it was a nice evening and there were too many people around. However the two cache clues confirmed that I was at the correct location.
Tonight (Friday) it was drizzly and hence better conditions for searching. As soon as I got there I realised that there is actually only one place where the micro could be and so I grabbed it straight away. I made sure that it was well covered when I put it back.
An elegant little puzzle. TFTC