Hi, I've bought a Nodal Ninja 3 MK-II to take panoramic shots here in Ireland. I have a Nikon D5100 camera (along with a SB 700 flash) and a Sigma 10-20mm F4-5.6 EX DC wide angle lens. Can anyone tell me what the correct top and bottom rail settings are for my NN3 with this camera and lens? I am quite close bot no cigar! Would greatly appreciate any help