Team, I know the Tissot Powermatic 80 from Tissot SeaStar 1000 will drop into an AP Diver for an easy upgrade. I believe that is documented here in a few threads. I also see Certina offers a Powermatic 80 movement in a few of their watches. Will the Certina Powermatic 80 movement, which I believe is the same as the Tissot except for the rotor decoration, work in the AP Diver upgrade application? I ask as I think it is more economical to find and cannibalize a Certina vs a Tissot by about $200. I reference this write up with pictures to clarify my point. http://www.gmtminusfive.com/the-certina-ds-powermatic-80-a-perfect-entry-level-automatic/ And the Tissot http://www.ablogtowatch.com/tissot-seastar-1000-powermatic-80-watch-hands/ And one last, perhaps, simple question. If the Powermatic movements are the same in both watches, does it matter that the date wheel is at 6 in Certina vs. 3 in the Tissot? I imagine it does not matter since the watch smith will swap date wheels with the AP. Please let me know your insight on this matter.