Polyrhythms in percussion mode

Have only used Dorico for a short while but learning quickly.
I am writing a piece for solo percussion and entering it in a five-line staff as you see. I would like to have a polyrhythm in bar 47 in a different voice but I am not sure how to do this. Anyone?

I’m nowhere near my computer for a week, and this might have changed during the 4 and 5 cycles, bit I’d still recommend to use the 1-line representation for the input phase (especially if you need to deal with tuplets) and then change the representation to 5-line-staff. My 2c.
And welcome to the forum, of course! I hope you’ll find someone to help you through this!