I am a big fan of the SuperTigre .51, it is stone reliable, runs perfectly on Fox 5% nitro fuel with 20% lube and is unbelievably tough. Mine has been on more planes than I can remember both as a glow and as a Diesel and its still kickin. Mine has the rare distinction of turning a 12x6 at 10,400 as a glow and a 12x6 three blade at 10,400 as a Diesel, most lose a few hundred rpm when increasing the load by 50% when converting to Diesel. I saw where a guy is struggling with an LA .46, if you run the LA .46 on 5% nitro fuel you can run the HighSpeed needle leaner and the airbleed screw can do its job much more effectively. So there.