The TTPro 46 weighs in at 17 oz with muffler while the Super Tigre weighs in at 27 oz w/muffler. The TTPro 46 pulls the plane just fine. It took 1 1/4 oz of lead on tail to balance with rx and battery as far back as I could get them without cutting cover to have access to tie them down. IMHO the .75 engine would be over kill but then I don't tend to over power my planes much, just the upper end of recommended range.