It shouldn’t be necessary, but checking the work yourself is always a good idea. I do it because I don’t want my wheels to fall off because they are under-torqued, and because I don’t want my brake discs to warp because they are over-torqued. I have had too many instances where work was performed on my motorcycle, and something wasn’t properly torqued. It is great to have a trailer so I can pick-up my bike without having to ride it home.