Ultimate Bee 1000 x 1000 ball screw whipping at speeds over 300mm/sec

Here's a short follow-up video, demonstrating the lead screw whipping at speeds over 300mm/sec. I purchased the kit intending to run the rapids at 500mm/sec, as they advertise on their website, but the lead screw whipping prevents it from running that fast. I only show 400mm/sec. here, but the whipping is even worse at 500mm/sec.

Here's is the text directly from the Bulkman3D website: "Upgradeable Motors Achieve Commercial Speeds Our ULTIMATE Bee CNC has options to have its motors upgraded to achieve high-speed operation similar to industrial machines. Very few machines can match the rapids speeds of up to 30,000mm/min like the ULTIMATE Bee can with servos. This means much faster workflow and more jobs done. Competitor machines offer a maximum of 5000-6000mm/min."

I emailed their support, sharing my disappointment and this was part of the response I received:

"I it is not recommended to run the machine faster than 15000mm/min to preserve the life of the ball nut."

So I guess, even though they advertise it as a 500mm/sec machine, they only recommend running it at half that speed.