Great wright up. Right on! Thanks!

For instillation, this is what I did as I was not happy with the idler running on threads.

I did not install the top bushing until the lower was in place. Then placed idler on bolt, then bushing. Had enough room on an angle.

I expect the reverse is true for removal. All one needs to do, is...
Push and hold bolt out of way, get lower bushing out. Use a drift, punch, nail something to start to move the top bushing from below and inside. Once the bushing is out. The bolt will come out the top at an angle!