It seemed to us none of the approaches above ticked all the boxes. In our opinion, these are the characteristics of the perfect recording set up, and how the above approaches comply with them:
Of the 4 approaches, mounted devices, if well implemented, seemed the most promising. Unfortunately, there was nothing we could do about the price of the ready made solutions, so we got to work on a DIY mounted device that was easy to put together and repeatable (i.e. can be easily rebuilt if damaged or lost).