Awesome! As a follow up to the suggestions offered by Joanna Johnson, specifically alternate ways to practice the arpeggios, I think playing them as chords is a great suggestion for fine tuning intonation. Re-create this piece by playing the bottom two notes of the arpeggio as a chord, on a long bow, for tone, followed by the upper two notes as a chord, for tone. Don’t go all through the piece, just a couple lines. You play this piece very well with very little intonation problems. But often in such a piece where the left hand is really challenged, I tell my students to eliminate the left hand all together. So one way to practices is slow, broken up chords — a new and beautiful piece! A second way for relaxing the string crossing is take the fingers away, and just do the exact bowing, open strings. Listen for tone. Attend to a proper bow arm motion with the elbow swinging freely and leading as the bow travels from G to E, and following the hand (staying under) as the up bow travels from E to G. Try it in reverse. Travel from G to E starting up bow, then down bow from E to G. Observe your movements in a mirror. Keep the shoulder relaxed. Sometimes playing the reverse makes as written seem easy. So much more can be explored with such a talented player and a challenging piece. But my final suggestion is to find the music beyond the technique of this piece. Hear the bottom notes stepping up, pull them a bit, cheat time, caress this ascending melodic movement with warm vibrato and sometimes a little more length than mere metronomic playing will allow. Conversely, consider the top of the chords, notes on the E string as ‘arriving’, completing, answering the melody apparent in the rising bottom notes. Again, make music of it. Vibrato, stretch time a little, make love to certain notes within the chord that change tonalities, give these emphatically to the listener, because he/ she might miss their beauty. So you have more than notes, bowings, fingerings, etc to achieve here. You already do that part. Now make the music as I have suggested here, one loving phrase at a time, building your own understanding of the composer’s intention, and improving your performance with each roll of the bow. Thank you for sharing this video. I always find it such a pleasure to see young men striving for brilliance. It’s a beautiful thing!