“GREAT piece of kit.
Versatile, solid, only drawback is not good for low angle stuff, - but you don't get a capacity up to 4x5" and 12Kg with a max height of nearly 2.2 metres without some sacrifice.
You probably already have something that will cover low angle stuff anyway.
Not a cheap item but V well made and a good investment for a Pro or serious amateur.
Had one for 40 yrs + and still going strong despite heavy use”