Ok call me slow if you will, but I have not heard this from anyone till tonight on another forum - but the XPROB series of tripods by manfrotto - the sort with the centre column that goes horizontal. Well if you life the centre column all the way up and then feel into the holder and press the button again you can pull the column all the way out of the tripod. Then you can put it back the bottom - and there you go - its upside down now! Good for us macro lot! and interestingly its not even listed on the manfrotto site as a feature!