Thanks for posting the video
I have a Chiron FZ12S that I am currently retrofitting, the spindle bearings seem good but I may have to replace them in the future and your video will be a help.
I am not sure if yours is the same though, does your machine have the basket style toolchanger?
Is the clamp/release of tools by pullstud and is that operated by air?
I also noticed you had a diagram for the spindle, would you be willing to send me a copy via email?
Hood