[zyNoT]

I do all Dodge's via bench flashing now. Haven't had a single problem.
RSA signature can be bypassed and removed directly with Calterm.
After that, it's all free game.

REMEMBER: THE RSA SIGNATURE IS FOUND IN THE BOOTLOADER, NOT THE CALIBRATION ITSELF!

Also - if you end up having one that fails and loses connection, it's not too hard to get it back.
First, kill the power to the ECM. Wait about 30 seconds, and turn back on. J1939 should be back up. (Again, this is why I recommend benching these!!!)
It is probably ROM booted and that's fine. Put module in SEEDED mode and flash with INSITE. It will be alive again.

The Chrysler's have a separate checksum that needs adjusted before flashing as well.
I have made a calculator that will update the checksum by reading the file.