Something else you may wish to consider. JLC allows you to have exposed copper areas. When you expose the copper area, they bathe it in tin, thus effectively increasing the thickness of the copper. Also you may post-process the exposed areas and manually thicken it or solder a bus wire. This is the top and bottom of my most recent board, pay attention to the exposed copper areas.
Of course then you need to be aware of the bare bottom conductors and clad them later.
I hope I’m helping.
Cheers,
Valentine
PS Nice video demonstrating the technique
