Complex sentence: The Miracle design represented the culmination of lessons learned from his many previous designs and with Barry Read, Jack Holt developed the slot and glue method of constructing Miracles which enabled some boats to be built from kits even by inexperienced amateurs.
Split into simpler sentences: The Miracle design represented the culmination of lessons learned from his many previous designs. Working in conjuction with Barry Read, Jack Holt developed the slot and glue method of constructing Miracles which enabled some boats to be built from kits even by inexperienced amateurs.