Greetings... I acquired an M41 for a great deal to give to my brother who is not a super experienced modeler... but knows enough to make this run ok...

So, I replaced the trim tabs, put in dual cooling, new motor jacket, and a set of nice 60C 5000 3S batteries...

Issue is no matter the battery placement, the boat seems to want to porpoise, but onto to its right side (almost like a torque roll)... I moved the left battery further forward thinking staggered batteries may work, but no joy... I have not tried dropping the left trim tab down yet (both are set in line with hull)...

And I am also topping out at just 38 MPH on the boat... while the porpoising may kill some, I saw on the box it was supposed to be 50MPH?

Would love any thoughts and help... this one has me a bit stumped...

Thanks!!!