Hi, I'm replacing an ISA268 movement on a Tian Harlan Chromachron Watch.  The movement was corroded by the battery.  Interesting as it has no "hands" as such, just a rotating disk that exposes a different colour of the face for each hour. But I can't get the movement detached from the dial.  I think I have found the two dial feet, but I am confused by two screws next to the feet that appear to do nothing other than turn in their housings. I thought perhaps these would be something to d