K'vod Tzibbur

Note:
I'm following a Mishnah B'rurah Yomit Seder ...

See SA O"Ch 128:34 re: Duchening by a koton....

Also
M"B 122
Sha'ar Hatziyyun 95 citing Rashi

Loose Translation:
SA: A minor should not duchen alone MB: even occasionally because it's not "K'vod Tzibbur" to be beholden to a blessing of a minor.

Any "search" on K'vod Tzibbur should include this case.

Kol Tuv,
RRW