More about that plaster form

Then, more about this plaster form. first Ihave to makes some choices, which parts I will keep (in black); which part Iwill not use (or scatter all over the place).
Now I had some trouble to obtain this: lead foil. This is incredibly expensive!I found that in a French mail order, that’s some SmallShop stuff to dorivets (another good idea that looks like it went in the drain). Anyway, theirlead foil is okay for my needs.
So let's start cutting and bending..