Front derailleur issues

After several rides where I stopped to fine tune my old Microshift
deraileur, I rode today without touching it.  It performed all shifts
up and down quietly with no problems.

"So, my wife asked when I relayed that to her, are you going to return
the new one that's due here tomorrow?"

"Of course not," I answered. "I will rip the old one off and install
the new one that's designed for a big ring of 50 teeth."

The old one sits way to high above the 50 tooth ring, and even though
it's never overshifted the chain off the outside in my tests, it's
just wrong.....

I also have an idler making noise. I think it's bearings are shot. The
Catrike will go back on the repair stand tomorrow without my proposed
modifications.  The parts for that are not here yet.

--
C'est bon
Soloman