Hello,
At the moment the batteries allow for about an hour of play. Minimum power to foil is about 2.5 kW. But still optimising. A lot of stop-and-go still. I am using this prop from Volker Volker’s Build - 80100 18650-30Q - #143 by V_S - Builds - FOIL.zone, but have some issues with cavitation at high rpms. I have printed it in PLA and covered it with a layer of carbon, maybe it is just not pure/accurate enough. Currently experimenting with the https://www.wageningen-b-series-propeller.com/ tool, to design my own propellor.
Below are the designs for the center console in the case and the battery spacers for the 18650.