Hello ZT,
Yes, Suzanne's video and her hints are great! But I think RamTI's issue is also a bit more fundamental in the BS-Basics. The Uchimura drills are really good for a stronger core (tested them myself with result muscleache...) but I think they shouldn't be used as "additional TI-drills", because they're forcing unwanted movements with coupled(right?) diagonal.
Best regards,
Werner