On a Strat, you put a spring in the trem hole before screwing in the trem arm. Does the PRS trem have a similar spring? I've owned more PRS guitars than I can count and I never once thought about this until last night when I found a spring on the floor after changing the strings on my CU22. It might have been an extra spring that I knocked off my workbench but now I really wonder. Can anyone help? Thanks.