Huh, that's cool!
Agree option to regen these trucks when needed should be standard issue. Problem is the liability and actually surprised to hear this is an option. Mfgs usually shy away from allowing user control over mechanical systems or repairs that the general public is not vehemently familiar with, that could cause injury or property damage.
Beware your 6.7 P stroke will scare the meek and probably you too when you put it into forced regen the first time! And stay away from the tailpipe!
3000rpms of 1000deg exhaust coming at you!