Your comments are always very helpful. I've desided to try FocusTune first, it is quite cheap and I can get it at a discounted price since I just bought the LensAlign. And also, Michael Tapes is a very helpfull type of a person and makes you want to buy his staff.
The only issue, I do not have any decent constant light source, so I will try my SB-700 with a softbox. Hopefully, it will work.