This is a drone that is in the development phase. It is foldable with a tilting camera using a 9g servo. Gradually, the model will be improved (it is still only a test model), a classic fpv unit that can also be connected to a GPS is now ideal for controlling the drone. The only parts tested are the battery and the camera servo mount (it's not an outdated solution, it's now glued on). they use cylindrical magnets with a diameter of 3 mm and a height of 3 mm to hold the arms in a still state.

A different attachment is needed for the propellers, for which there is also a model. It is ideal to print it on an SLA printer.
I am attaching links to things I use:

https://www.aliexpress.com/item/1005006391147024.html?spm=a2g0o.order_list.order_list_main.66.44f61802WnoEUC

https://www.aliexpress.com/item/1005005955679381.html?spm=a2g0o.order_list.order_list_main.106.44f61802WnoEUC

https://www.aliexpress.com/item/1005005674800754.html?spm=a2g0o.order_list.order_list_main.116.44f61802WnoEUC (only esc)

https://www.aliexpress.com/item/1005003386013275.html?spm=a2g0o.order_list.order_list_main.195.44f61802WnoEUC (4 PC-1106 4200kV)

https://www.aliexpress.com/item/1005002889201568.html?spm=a2g0o.order_list.order_list_main.220.44f61802WnoEUC (you need reduction)

https://www.aliexpress.com/item/1005005983082642.html?spm=a2g0o.order_list.order_list_main.265.44f61802WnoEUC 

https://www.aliexpress.com/item/33028765862.html?spm=a2g0o.order_list.order_list_main.492.44f61802WnoEUC (TS5828L Transmiter)

https://www.aliexpress.com/item/1005005594442876.html?spm=a2g0o.detail.0.0.2b1dcljZcljZtR&mp=1