Hello Darren, there are ( Adjusting vertical positioning of grace or ghost note ) some posts in this forum already, that deal with Swiss Rudimental Drumming notation. Dorico can deal with them; MusicXML does not seem yet to respect or embrace the “new” glyphs, but one step after the other. Daniel shared ( dorico percussion grace note with slur (flam) - #27 by dspreadbury ) earlier a Dorico file that already used Flam and Doublé. I propose to start with this file.
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