It took me some practice also and here is my technique for what I feel are smooth and safe T/O's.
Apply right rudder trim, placing the needle under the R.
1 or 2 notches of right aileron trim (depending on crosswind component).
Pitch trim down 2 notches.
15° Flap.
Line up on centre line.
Brakes on, propeller RPM lever fully forward, power up to 2500/3000 RPM, hold stick back.
Release brakes, stay on centre line initially by tapping the brakes.
Smoothly apply full throttle, rudder becomes active, stick to the neutral position.
Tailplane rises, be ready to counteract the yaw.
Pump the stick back in small movements to tease her off the ground.
If you still experince left aileron roll upon T/O, apply more right aileron trim and firm stick pressure to the right otherwise i find it will massively drift off track if allowed to.
Hope this helps someone,
Cheers