there is very little point in trimming for landing with a model airplane due to the fact that your in a turn most of the time and havig to carry back pressure anyway. I would suggest slowing the plane down to a good approach speed on an upwind leg and then going into your landing pattern, maintaining your approach speed with elevator and controlling your decent with your throttle and fly it to the runway. Alot of full scale thinking does not translate well to models. In the end, it all boils down to letting your subconcious reactions take over, If you need to think about what your doing, your behind the plane and in trouble. I suggest as I have done, go fly a whole bunch of landing on a sim and find out what works best for you.