I manage 7 shaves on a blade so as a rule I rotate razors on the blade change day which is saturday. If for some reason I change the blade early i'll usually go ahead and rotate the razor.
As a rule, I use each razor in my rotation for a week. I typically change blades Sunday morning along with a different razor.
Enjoy your Vision, it's my favorite of all my razors!!
I generally load 3 razors and rotate among them until it is time to change a blade. I then select another 3 razors. However I have been stuck on my Futur for nine straight shaves (and three blade changes)...I just cannot seem to put it down.