Yes,
I personally have not had to use it but, I have read that some screws and nuts just don't stay in place without it! I would be worried about getting the screws loose when needed but, it is also not much fun when you have to call it a day because your truck fell apart! I read it in one of the Mags in the "Tip" section! One of the readers had trouble with his Monster Pirate and that is what they said they had to do to fix the problem with there test truck as well!