While the tool itself is beyond simple and inexpensive, anyone have any recommendations for a set? I'm going to be doing a valve adjustment when I do my injectors and I just wanted opinions. Is it better (Cummins engine sake) to get a set that is bent vs straight? If money weren't an option I'd love to get the Snap-On set for the 24 Valve motor....$990.00 . The feeler set they sell are bent.