starting up a DL3

I am just curious how close the projector is from day to day for an image. I'm not going to be collaging them at all, but just a single image from each DL3. I'm wondering how close that image will be from day to day in the same spot in terms of projection shift. I know, watching projectionists often, that sometimes projectors can certainly go off from day to day, and this is obviously both a projector and a moving head (which I know can be off a little bit from day to day).

I'll be doing some massive keystone correction using the server's correction adjustment, and I'm wondering how much that could be off due to the projection movement (and P/T) overnight after shutdown.