Note, unlike my Manfrotto 494RC2, security can remain unkempt. Some find it and perhaps other annoying. Anyway I would like to know to buy.
The plate is identical to the other tray and fast interchange without worries.
Security is a bit hard, it buttressed from time to time, which make that the closure is not always of itself when the platform is affixed. Overall it is a bit less than my other assembly ball but it's nitpicking.