Ive got a pack of flatline 340's and am having trouble getting the inserts to fit. Seems like the inserts are the wrong size or something. You can put the insert in the shaft and it wiggles around a little. If you push the insert to one side while in the shaft there is a lip on the other side, like the insert and shaft are two different diameters. I called easton and they said there is only one size of the micro lite insert. Seems like there might possibly be a defect in the shaft or the insert maybe? Ive owned several doz flatlines and never had a problem like this before. Thoughts?