Hi falconlb46,
No, you can never have to much torque, the issue here is price and weight. It would be costly to put a 250oz-in servo in your trainer unless you had plans for it down the road. I would plan on putting a little better servo in the Corsair such as a coreless or digital, and stick with the standard for the trainer, this should keep the warbird on the shelf for a couple of years. I would avoid buying the cheap 4 channel radio and spring for the 9C or another quality computer radio, use the standard servo's for the trainer and then pick and choose servo's as you need them for your next plane, you will be happy you spent the extra money, you'll need it for the corsair anyway.