As for pipers using kilt rosettes.

Besides officers and NCOs, Pipe-majors of many Scottish regiments usually wore the rosettes (or Gaelic knots) on their kilts as decorations.

PMs of Scots Guards, Black Watch, Royal Scots Fusiliers and later Royal Highland Fusiliers, A&SH, and some other regiments, and Irish too...

Probably the first evidence of pipers kilts rosettes is picture of piper G. Clark from 71st (Highland) Regiment of Foot, 1808-09, see there http://www.scottishmilitaryarticles....18031815_3.htm

regards,
Mikhail