Navajo speakers; we plan on adding a centered version of the Combining Ogonek [U+0328] character to Silver (example of existing Ogonek below);
Ą
into the mostly empty Combining Diacritical Marks Extended block [1AB0—1AFF]. This is seemingly an issue with the current Ogonek character overlapping between Polish/Lithuanian and Navajo, with the current Combining Ogonek [U+0328] character being set off to the far right side of the character rather than the center, which is standard in Navajo.
A safe candidate would be [U+1AFF], as it is at the end of the Combining Diacritical Marks Extended block [1AB0—1AFF], and runs little risk of being over-written by any near-future update to the Unicode stardard.
Would this be desirable or too out of the normal Unicode range of what you are able to type?