FOR MY EYES ONLY!
No way am I going to tell (a Mahaguru must always keep some secrets) but it is THEE one mod that I did over the rest that I didn't anticipate would result in such a responsive light engine and to my surprise, my regular weekly urban driving that took up almost a full tank of petrol (short of lighting up my reserve tank diode) now only takes up 3/4 tank of petrol and I didn't expect it to cost so cheap an investment.