[Dafni]

Hey Booda, I just found this thread.

Just a thought: You may want to adapt the Novak gearing recommendations to your increased wheel size.
I don't know about your wheels, but if they are bigger, I would re-calculate the gearing. Let us know when you need any help.

About busting diffs or driveline components .... there's always something that "can" break. But the idlers are a good idea, for sure.

Sorry to hear about your sons' handicap. I wish you guys all the best, and good luck with the trucks.