[phenixbb] Autosol + MR

Hi, I have partial solution from MR on a crystal with dimensions 52.729 60.364 142.908 90.00 90.00 90.00 P 21 21 21. I have SAD data from another crystal with dimension 53.860 61.470 142.492 90.00 90.00 90.00 P 21 21 21. My question is can I treat both as isomorphous and combine data from both of them and use my MR as model with Autosol. What is the maximum difference in unit cell dimensions allowed to consider two unit cell isomorphous? If you can point to some references/examples that will be highly appreciated. Thanks a lot. Marusa