Grace Notes with Ride and Crash Cymbals

I have a flourish that I am trying to write: it should be two grace notes followed by the downbeat. First note should be the crash cymbal, followed by the ride, and then both at the same time. Dorico keeps putting the grace notes as a single event with the same flag. The only idea I could come up with is by putting it into a second up-stem voice but it doesn’t look quite right to me. I would love it if the grace notes were beamed. Any ideas?