I've got this exact setup. I assembled mine with tricycle landing gear and came out nose heavy as well. I moved the rudder and elevator servos back near the tail and still needed 1 oz on the tail to balance. If the specs on TH engines can be believed, the TH .75 (23 oz w/ muffler) is actually slightly lighter than the TH .61 (23.8 oz w/ muffler) which is why I went with the .75.