I installed a thin copper shim giving about 1.5 mm clearance. I checked the chain line using a long straight edge. The inner chain ring is aligned with the third of six rear sprockets on an Ultra-6 freewheel (120 mm rear dropout spacing). That sounds about right, doesn't it, or is it off?
If that is reasonable, I will consider replacing the copper shim with aluminum or stainless steel foil.
Any ideas on a solvent for the thread locker?