I spent a hour yesterday playing with valve timing - recording results on a GTech Pro ie power runs from 2000 to 7000rpm on a suitable test track.
I only tried +/- 6deg either side of the recommended 110/110, seems the recommended setting is the best all round result but 104/116 gave a boost to the bottom end at the expense of top end. The variations don't seem enough to warrant another visit to the RR.

Does anyone have a fueling and ingition timing map, I'd be interested to compare with what I currently have.

Any views on gains to be expected going from fast road to rally cam (I found a site which suggested fast road was +18BHP and rally +22BHP - I'd have guessed nearer +12BHP, +18BHP).