Diagnostic adapter recommendations?

[Rawze]

For cummins stuff, ability to flash cummins ecm, combined with truck general troubleshooting, chneese or genuine inlene 5 or 6 is fine.

For non-cummins stuff like CAT, etc. and you want to flash a cat or other non-cummins ECM, - genuine nexiq.

If your working on other people's stuff -- YOU NEED BOTH!. Problematic communications issues when working on other people's stuff are quite common. Sometimes having a different type of adapter + the extra OEM harnesses to go with them will save you hours and hours of pulling your hair out after you loose communications on something in the middle of a flash, and now the engine is a brick until you get it recovered.