So there are sections in the Rachmaninoff Rhapsody on a Theme by Pagannini where the fingers are divided unidiomatically among black and white keys, sometimes the thumb starting on black key, sometimes not.
A particularly annoying section to get evenly for me is these arpeggios which span 3 octaves and spread the hand.
To get precision, should I do pp practice, staccato, using as little of the key as possible and keeping my hand close, or something like F practice with my fingers lifted high, etc?
for me with these type of passage i always practise hand close, and all type pp, ff, legato, staccato sheeyat (most importantly fo me is hand close economy of motion sheeyat)