I found this thread while searching around.......I maidened my Modeltech ME 109 today and all went well. I have an OS46 FX (yes, it's a .25 size plane), mounted the rudder and elevator servos in the empennage and am turning an APC 8x10 prop at 16.5K. No lead to balance and dry weight is 3.75 pounds. I built it in hopes that it would be fast and it is no disappointment. Took it up high and got it slow to see how it stalls and got a violent left wing drop that developed into a 2 turn spin. Definitely don't want it too slow on short final......flies nice.