Lead weight for ISS and LEO satellites tracker

To cast the lead weight for the satellite tracker, a negative mold is required.
This consists of aluminum foil wrapped around a positive mold.
The negative mold was placed in a flowerpot with slightly moist soil and then filled with molten lead.
After cooling, the lead can be easily removed from the mold.
Slightly more lead (approx. 70 grams) was melted than needed, as some remains in the lead melt. The weight was then reduced to the required 60 grams using a rasp and file.