I have a real simple question. I bought a new plane and engine. A world Models Fun-Fly 40 and a Aviastar 53. My problem is my servoes. All I had in my shop were old S-148 servoes. I found one I think is bad because on the ailerons it's slower than the one on the other wing and does not have the same strength. Any -how I think that they are to weak for the plane. I don't fly 3-D all the time but I do sometimes. Which servoes would you recommend. I have tried off-brand and have not had been satisfied. I want to stay with Futaba. I use a 6EX Transmitter and 4.8 volt battery. Cost is an issue as I am limited on my budget. Thank-you