Here's a decent video of this boat with an Enya .60 four stroke engine on it with wet rudder and I think 12x6 prop. I've never been able to get it to not hop in the turns. The porpoising can be cured if I had spent the time to balance the boat (move the engine forward) better.
https://youtu.be/fVadTr40eQw
Heres a short video on the water with the 1.20 four stroke engine:
https://youtu.be/dUUC1GWJfgQ