I read Sharktooth's write up on this but by the time I would have done the maths, it would be faster to do in practice. I have watched Fred Newman's video on tilt and shift. He showed on his camera (which has base tilt at the bottom of the standard) on the front and he stated to focus on the near and then tilt to focus on the far and repeat 3 times. For rear tilt, he stated to focus on the far and tilt to the rear. Is there a reason for this?

My Sinar handles tilting very differently to my Chamonix. If I have my descriptions correct. The Chamonix has axis tilt on the front lens and base tilt on the rear. The Sinar has base tilt at the bottom of the lens board. Will this effect the way and place I focus and tilt to?