Just got my Mig and Sabre about a week ago but have to finish another project before I tackle them. One thing I'd like to try is something that worked well on my old Kyosho T33. Called cheater holes. Many times you can't get enough air into the intake, more air= more thrust. On the Mig, going to cut holes just below the wing about an in. long and 3/4in. from the wing downwards. Then feather it in to duct cleanly it into the fan. May or may not give 'er more poop but only one way to find out.