Problems with 360 LA distributor

When I stripped the dizzy for inspection it was noticeable the top part that locates on the dizzy shaft and mechanical weight was quite a slack fit. I did wonder if this can be sleeved?

Not sure what you mean be exact fit or curve, assume its to do with advance curve?

Is it normal that when you pull off the rotor arm you pull the top part of the shaft up and out of the mechanical advance weight and then need to mess around relocating it. Or is the a rookie mistake and once learned you hold the reluctor down whilst pulling the rotor arm?