If Jurassic with the 20kg hasn't "got you there" with the 24kg, the volume with the 20kg in the classic ROP might be better for moving your press up, so I like your idea.I actually ran 2x runs of Jurassic with the 20kg before swapping to the "classic" version @24kg.
I'm leaning towards the classic version @20kg with the light day @24kg, as supersetting with the pullups make my back feel good.
Thanks for your advice
You could also consider using something like Giant or Easy Muscle with the 20kg ... but this is the ROP Support Group and that might be unsupportive advice...