Hello gentelmen. I was readn a few of the conversations pertaining to Komatsu software. Iam a field mechanic for a dealer in Chicago. The only diagnostics applicable with a laptop is the Cummins engine harness for Insite. On the late model loaders you can access the J1939 plug behind the cab seat under sheet metal. Not very accessible. We have the parts manuals and service manuals on a memory software card called Lacie. It has to b down loaded from Komatsu.U have info from 1950 to present on there so you dont have to carry so many books or rely on your local parts department.