Costing up the required commercial tools has an electric burnout furnace coming in at £1200, plus another £700 for safety crucible furnace and another £600 for a centrifugal casting machine. £2500 to cast a single shoe seems a tad on the heavy side so here goes another experiment.
2.5l paint pot
terracotta flower pot to fit hole
glass filler beads.
Vasa 55 EDF unit
300 brushed 12 motor
2 tin cans, a stick and some charcoal.
Not many folk will get EDF into the Scale sailbots forum!