It's in the tester's manual as well, isn't it?
C
Immaculate apostrophe use there it has to be said.
No, it only says that if the vehicle or system is not suitable you can use a deceleromter and defines how this is done.
I'd have thought that 'not suitable' would cover both damage to the diff and risk of coming of the rollers.
C
Yes, but it’s not specific on the criteria.
So the tester using the rollers is still wrong. Good
C