Slowy, play a note, holed... jump to next.. stop hold.... jump to next etc, also best thing I find to do where leaps ar concerned...... make the leaps bigger!! Start on Bb, jump to the Eb an octave above the actualy one, learn it like this, then you'll feel so much love towards feeble leaps

thats how I did la campanella, and pieces with similar jumps.
Fingering seems fine, although i have looked at this piece and i used 1-5 all the way but thats just me.
And relax the arms on the leaps
and if you really fancy a challenge, put a blindfold on or turn out the lights
