The circle-bar diacritical was originally created to mark long vowels. I'm now using it for vowel sound shift since I can convey vowel length through other means by now. This is similar to the consonantal sound shift marked by a simple straight bar. The names Grawûnna and Shêlrabera perfectly show these in action.
I'm not sober and shouldn't be here. Ugh.
Link
Tapeworm
oh man, this is one of the last places I expected to see a conlang!
This is very nice