Wobbly slipper / spur on Blast

[farmboy]

I've been racing my S10 Blast at York since last September and it's suddenly developed a problem with the spur/slipper assembly. At one point in every revolution it sticks a little. It's easy enough, even by hand, to get over this point but I think it means the spur isn't sitting properly. I've had it all apart and have reassembled but it still binds a little.

Has anyone else had this issue?