Lowering the superduke

You can drop the forks through the yokes (triple clamps) but you do need to be careful with your ground clearance. And it'll make the bike turn in even sharper. A shorter rear shock would compliment the dropped forks. You might be able to send the shock off to a shock specialist that can rebuild the shock to a shorter length (along with springing and re-valving it for your precise needs).
And, a lower seat, obviously.
A final option is to use wedged boots. Daytona has got such boots, if my memory serves. 10mm here and there can make a huge difference.

i have the same problem, before i brought the SDR i called a company near me called MC Tecnics suspension set up. He has done a few of the 2008 super duke R race bikes and he told me that the SDR can be lowered 20mm max without changing the handling?? how he can do this i dont no? But my bike is booked in early March so when he has done it and i watch what hes doing i will know. He said that it dont involve changing and springs etc its a ride in rideout set up £85