Hey nice tutorial thanks a lot! As for beginner was a bit hard to fallow, even if it was step by step (but i guess that's my problem because of lack of skill), so at the end i give my own touch, but still you can take a look if you want too.
P.S. on image bellow, I was using my band new Intuos Pen&Touch tablet. I never used tablet before, so that's my very first image with it, I'm happy with result even if it's not perfect. I'm could not call myself artist, but i would like to do it one day
Um, I dont know if yovue already solved this, but I think it might depend on your version of Sai. So far Ive seen about 2 different versions (I have both.) But the water tool can be very similar if you put the right settings in.