Pentax 645Z with pixel shift???? But what file size?

Have gone from my K-7 to the K-3 II. Keeping the K-7 as a back-up. The K-3 II is quieter and does HDR and multiple combined shots as DNG's rather that JPG's. Much better format than JPG's. Much better noise controlled than the K-7. It is a better camera with many more features. I use the 60-250, 16-50, 90mm Tamron macro, and have a 28 2.8 pentax and a 50 1.4 rekinon for low light. The kit is getting too heavy but it is lighter than my Canon F-i kit.