......my preference is to have the airplane trimmed hands off for the approach speed to make the approach less work and at surface contact use a slight forward movement of the elevator control to pin the airplane to the surface by dumping the lift vector.
Some pilots use nose down trim and just relax the back pressure at wheel contact
Not sure I understand that technique. Surely once on the ground you have full aft stick to kill any tendency for it to take-off again. Effectively a 3-point attitude is in or close to a fully-stalled state, so why would you want to unstall the wing?