Appreciate all the feedback.
I did have both Cummins software packages installed on a laptop I used on the previous coach. One was very basic used mstly for checking trip data or pulling codes. The other was the same as used at a Cummins shop, extremely comprehensive as you would expect.
I do have an Aladdin system but have not yet figured out how to use all its features - working on it. I also have a copy of VmsPc running on a laptop.
I was afraid the Cat software was available only to dealers. Looks to be the case.
Again, thank you for the feedback. I have very limited experience with Cat and am trying to gather as much information as I can prior to actually "needing" it. Have limited, but excellent, experience with Cat shops. Hope to keep it that way except for routine maintenance.