Stefan, you want one quarter note per shot, i.e. 5 beats, right?
Or are you trying to play quintuplets, 5 quarter notes in the space of 4 beats.
If it is for 5 beats you might want to try a 3/4 followed by a 2/4 time signature in place of the 4/4 - 1/4.

Although it probably is available but I have never heard a 5/4 measure in bluegrass. But then again I don't listen to a lot of bluegrass.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware