Thanks, dill.  I am in, at $53.  There are other posts, on this
general subject.

Withe the 30 degree curve of my Martin Logan panels,
this should be fun.
The ACETAL is $53, Aluminum about $400 and Titanium $ 525 in the ear trumpets not the other thing.
The calmer is about $25 it's basically an earplug with a hole in it. Some people have said it helps with tinnitus.