I had an Avon 4.7 Sea rider ( I loved that boat and still miss it )
with a Yamaha 70. She was a Pocket rocket and topped out at 42 knots, between aabout 33 and 38 knots she Chine walked quite badly but after a bit of practice I found that I was able to power through it,
The trim did help little bit but I found that by limiting my corrections to the steering when chineing was by far the best way of getting around it. Very very slight movements of the wheel will make it easier to control.
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo