Just a thought in that it really doesn't matter about the 3W up front, it's just a case of some judicious throttle use. When you're slow flying, monkeying around with the elevator doesn't really produce any additional pitch change when you're close to the runway because the model is very close to being stalled at that point, but a tiny blip of the throttle will add some authority to the tailfeathers and a bit of lift along the wing root. The additional authority on the elevators from the prop wash will allow you to pitch the nose up a bit more and slow the descent rate due to the higher angle of attack (AOA) on the wing. That is why it's possible to slow fly at a lower airspeed than what the power off stall speed is, and a power on stall is much slower.

You'll also usually get a bit of ground effect to work with, but that is more evident as the speed increases and is why it doesn't want to land if your approach/landing speed is too high. It gets in that ground effect and just keeps going. Full scales do the same thing and low wings are much more prone to doing it than high wings for obvious reasons...

It does take practice, but you can set them down very lightly using this method.