As said above, a lot of 1:1 actions don't transfer to models well. Have someone go out with a stopwatch and time how long it takes your model to get from down wind to touch down. I think you'll find you almost don't have time to retrim the model. The negative side to trimming a model to land is that if you have to punch it, you now have to fight the ballooning model by holding nose down and trying to retrim.

Not that is isnt wrong to do it, just it takes more time than it's worth.

MTC
YMMV
Been teaching folks to fly since 96