FMS responded back to me last nite with essentially the same info you posted:
We did notice the spinner problem of 1700mm F4U, it is not strong enough, we will make new stronger spinner, and for the orders of 1700mm F4U will be replaced with stronger spinner once it is on line.
Your email was forwarded to Leo, thank you for your suggestion.
In another email Yolanda stated: "Regarding your questions, please wait a couple of days, our engineer is still on his vocation until today, I will confirm with him once he is back to office."
So we should have some definitive info later this week.