Coil Balance Help

I don't think replacing the support bushings will have any effect on how the balance itself locks in place. The only role those parts have is to anchor the screws to the frame, and it should be perfectly okay to just re-use the old ones.

Can you go into more detail as to exactly what's happening? You said that the shoe can unlock fine, but will not re-lock. What happens when you try to turn the cam to lock it?

That is very odd. If you're using an all new pivot shoe then you shouldn't be running into this problem at all.

I've honestly never heard of this issue before now. I had one more request for you before we go any further: if any of your old pivot shoes still work, can you install it in the same space to see if it runs into the same issue? I want to narrow down whether it's a problem with the shoe itself or the jamb.