I prefer down elevator for brake activation.. You have the stick in your fingers when you land and don't have to fumble around feeling for a new one. If you are too fast it doesn't matter which brake switch you use they wont work when there is still lift being produced. Land on speed and in the first third of the runway and your brakes will work with any switch to stop on the runway. Land long and fast and you will be just like full scale landing long and fast off the end of the runway. If your approach isn't right GO AROUND and set up again.