Manfrotto 122B Adjustable Pole for Backlight Stand - 21 to 33.5" (53-85cm)

Hi, what is the diameter of the outside tube? Thanks.

Can this hold a 21" LED flapjack light (about 7-8lbs), say mounted as overhead/straight-down for table shooting? (via SuperClamp attached to table, then Avenger grip-head to angle this pole 45º, then LED light pointed down towards table) Also, same question, but for mounting a Sony A7iii camera/lens setup (about 1400gram or 3lbs setup) for overhead/straight-down shooting on table?(via SuperClamp attached to table, then Avenger grip-head to angle this pole 45º, then small ballhead, then camera/lens setup pointed down towards table)

I have Impact LS-3S, and in 4 months, the rivet holding the 5/8" stud to the pole at the base is now loose. Mounting a light will cause it to lean to one side making the background light less round. Does the Manfrotto 122B use a rivet to secure the 5/8" studs to the pole?

I'm looking at the Manfrotto 122B Adjustable Pole for Backlight Stand - 21 to 33.5 (53-85cm)Can you tell me more about the treading on the top end. Looks like 1/4 inch. Is that correct? Also the bottom end looks like a stud, if so, please tell me the size of the stud and the thread size of any threads on the bottom stud.Thank you,Ernie Winn