dave, if you get the cam off you'll see there is a raised area on the cap itself that is a built in spacer. yes, it is designed that way. there is supposed to be contact between the 'spacer' area of the cap and that central part right around your axle (which i can't think of what its called right now) on your cam, but not much else. the spacer i put in that area was very thin, and only the size of the raised area on the cap, so i didn't change the intended contact points, i just added a little tolerance because although i put new limbs on - i didn't want to have to worry about it.once the worry sets in,you know -its all over.