Reuse of depth maps

I have this project with 6600+ inputs (close range photos + laser scans). At this point, reconstruction is in progress with image scale for depth map calc set to 1, and Default grouping factor set also to 1.

Depth map calculation is done, and now it is in stage of creating model (7250 parts :o),

If I stop reconstruction now, change grouping factor to 2, and re-run the reconstruction, will depth maps be re-used? Can I tweak some other setting to speed up process, and still have satisfactory model geometry?

Final result of reconstruction should be highres ortophoto…