Many years ago as a newly qualified civil engineer I went to my first proper site knowing everything!! My new boss was much cleverer. I spent 6 months as a chainman helping a proper engineer, I walked miles carrying a huge wooden tripod and a bloody great wooden box containing a theodolite; I really hated them and severely abused them whenever possible, all to no avail as they were still there and working next day.
After starting a degree course in photography and obtaining some very expensive gear I bought a Manfrotto tripod for £150, although I never felt happy with my gear sitting on this on the rocks, or up a mountain in a gale on the west coast of Ireland.
A decision was made to combine the rigidity and strength of the theo legs with a quick release head for my cameras.