Thanks everyone - call me perceptive but I am guessing the consensus is no
Thankyou for your suggestions - this is really a last touch item for me - the frame is a custom geometry which was designed by Darren to take my upper body (and huge noggin) weight off my hands by moving the saddle behind the BB and elevating the front end subtlely compared to a stock frame so the fit and position have been considered.
I have concentrated on subtly tuning the bike for long distance riding over the mast 6 months with the aim of reducing fatigue - I am not a quick rider and for me the aim is to ride longer rather than quicker. The cockpit is really the final fine tuning.
I'm running low profile alloy wheels (ditched my 45mm carbon clinchers) with bigger tyres (using both 25C and 28C Schwalbe Ultremos), changed my saddle to a carbon rail version and fitted a Syntace P6 vibration suppressing seatpost. I swapped to the Pro bar beause the drop position is so much comfier than the Deda it replaced - would never have considered fitting a 290g bar to my bike in the past but things change.
I have a couple of carbon bars and found that the Zipp in particular really made a difference to ride quality - just trying to avoid a carbon bar for the reasons given. The Deda Pressa has far less difference - but then it is a pretty solid carbon bar.
The bike handles beautifully but was just looking for a little less directness in relation to feeling all of the road surface through the bars.
Will have a play around with some different bar tapes.
Many thanks for all suggestions