I just bought a brand new 30” predator 314 shaft with 3/8x10 threads and when I put it on my McDermott 29” butt it wobbles bad. When I put the shaft on my custom sneaky Pete 30” butt it rolls fine. So I wanted to test my theory that this is due to the mismatch in butt vs shaft length and I had another 30” shaft from before and yet I can put it on either butt and it rolls straight. Is this a facing issue on the collar? So odd.