After 28 miles, the 6mm EVA was crushed down to 2mm & the metatarsal started acting up again, so the decision was made to double up the EVA.

A  small plate was sandwiched inside to aid the toe plug.

Another flap was hot glued outside protect the toe plug.

70 miles later, the metatarsal had no problems, the 12mm EVA was crushed, but it was still easier on the metatarsal than 6mm alone.  The mane problem was the EVA becoming very slippery when wet.  The 2 sheets also tended to slip on each other.

The soles after 100 miles were on track to last maybe 500 miles.