the turret turning system

a little video of the motor and the gearhead
https://youtu.be/6APESpE42aY
and the rest of gearhead
and a video to show how it´s works
https://youtu.be/oIVaSKgdFJg
to show, lower structure and boom, i'm delaying too much the time to show advances (becasuse i would like to show those set more advanced) and at the end, i lost pictures along the way
base for the upper structure
This part is the one that supports the whole upper set, to it is taken both the arm and the counterweight, the base is a 6mm of steel sheet and the most important parts are either groove joints or threaded, photos:
the boom:
It is composed of several pieces, the main structure is made by joining steel sheets of different thicknesses, with them I create an inside skeleton, the pivot points are solid pieces, to complete it i will fill the interior with epoxy and filler to give more consistence , Photos: