nice to see someone having a go at this, in my old life i used to fix things like that (Brittish) CVRT, FV430, though never did the chieften tank, i know the Challanger has a rollsroyce CV12 (v12) diesel but don’t know the specs for the drive train
that said the FV430 series has recently been upgraded with a new engine+drivetrain also the cvrt had a makeover but afaik was just an engine swap
but its nice to see someone who knows the difference between a normal turn and a neutral turn 