PW4 Do WHD come with FactoryImages (PW4)

Hey Guys,

sorry for me asking a probably Noob Question, hope u can get me some clarification: Im about to get a PW4 Warehouse-Deal, but wondering if ill be able to JB it.
Will my WHD-PW4 come with a FactoryImage?
According to those obviously quite new Discoveries (https://www.mobileread.com/forums/sh...d.php?t=320570) it should be possible to JB everything >=5.11, so assuming it does come with a FactoryImage i should be lucky, right? If its not an untouched FactoryImage (but recent FW), im out of Luck, as one cant downgrade, and there is no FactoryImage around for the latest FW, right?

Hope you dont mind me clarifing, and that its not a too stupid question...