Where should I go next? RDT testing

Hey all - been a member here for a while! Unfortunately, I haven't cracked the code yet. My goal is mostly playing bebop a la jimmy raney. This seems to be achievable using usx, but there are just a ton of moments when im playing where I need to dbx. I've had a few moments of clarity where I breakthrough like this forum post: https://forum.troygrady.com/t/more-crosspicking-experiments/2057 But, I really feel like I've stagnated. I think I have a hand sync issue and some inconsistent motions. The fastest I've gone for a real song lately has been the 16th note run in bud powell's song Celia which is about 156 bpm. I had to lay out the picking for strict USX and felt like my left hand wouldn't want to go much faster on the fretting end. Any guidance would be greatly appreciated. EDIT: I updated the videos with a better video of the sixes - Maybe I should surrender the dbx ideas and just try to get better at the hand sync with usx?