Will this also fit the GX600B200? (The GX600 replacement plate is on backorder)
I purchased this for use with the GX650B204, so I don't know if it's compatible with the 600B200; however, I would assume if there are two different plates manufactured for each model of tripod, they're probably not cross compatible. Sorry, I'm not much help. I would suggest calling Adorama or the manufacturer to confirm compatibility if you haven't done so.